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9 | 1639-1642 | He observed that the
zinc plate lost its charge when it was illuminated by ultraviolet light Further, the uncharged zinc plate became positively charged when it was
irradiated by ultraviolet light Positive charge on a positively charged
zinc plate was found to be further enhanced when it was illuminated by
ultraviolet light From these observations he concluded that negatively
charged particles were emitted from the zinc plate under the action of
ultraviolet light |
9 | 1640-1643 | Further, the uncharged zinc plate became positively charged when it was
irradiated by ultraviolet light Positive charge on a positively charged
zinc plate was found to be further enhanced when it was illuminated by
ultraviolet light From these observations he concluded that negatively
charged particles were emitted from the zinc plate under the action of
ultraviolet light After the discovery of the electron in 1897, it became evident that the
incident light causes electrons to be emitted from the emitter plate |
9 | 1641-1644 | Positive charge on a positively charged
zinc plate was found to be further enhanced when it was illuminated by
ultraviolet light From these observations he concluded that negatively
charged particles were emitted from the zinc plate under the action of
ultraviolet light After the discovery of the electron in 1897, it became evident that the
incident light causes electrons to be emitted from the emitter plate Due
Rationalised 2023-24
277
Dual Nature of Radiation
and Matter
to negative charge, the emitted electrons are pushed towards the collector
plate by the electric field |
9 | 1642-1645 | From these observations he concluded that negatively
charged particles were emitted from the zinc plate under the action of
ultraviolet light After the discovery of the electron in 1897, it became evident that the
incident light causes electrons to be emitted from the emitter plate Due
Rationalised 2023-24
277
Dual Nature of Radiation
and Matter
to negative charge, the emitted electrons are pushed towards the collector
plate by the electric field Hallwachs and Lenard also observed that when
ultraviolet light fell on the emitter plate, no electrons were emitted at all
when the frequency of the incident light was smaller than a certain
minimum value, called the threshold frequency |
9 | 1643-1646 | After the discovery of the electron in 1897, it became evident that the
incident light causes electrons to be emitted from the emitter plate Due
Rationalised 2023-24
277
Dual Nature of Radiation
and Matter
to negative charge, the emitted electrons are pushed towards the collector
plate by the electric field Hallwachs and Lenard also observed that when
ultraviolet light fell on the emitter plate, no electrons were emitted at all
when the frequency of the incident light was smaller than a certain
minimum value, called the threshold frequency This minimum frequency
depends on the nature of the material of the emitter plate |
9 | 1644-1647 | Due
Rationalised 2023-24
277
Dual Nature of Radiation
and Matter
to negative charge, the emitted electrons are pushed towards the collector
plate by the electric field Hallwachs and Lenard also observed that when
ultraviolet light fell on the emitter plate, no electrons were emitted at all
when the frequency of the incident light was smaller than a certain
minimum value, called the threshold frequency This minimum frequency
depends on the nature of the material of the emitter plate It was found that certain metals like zinc, cadmium, magnesium, etc |
9 | 1645-1648 | Hallwachs and Lenard also observed that when
ultraviolet light fell on the emitter plate, no electrons were emitted at all
when the frequency of the incident light was smaller than a certain
minimum value, called the threshold frequency This minimum frequency
depends on the nature of the material of the emitter plate It was found that certain metals like zinc, cadmium, magnesium, etc ,
responded only to ultraviolet light, having short wavelength, to cause
electron emission from the surface |
9 | 1646-1649 | This minimum frequency
depends on the nature of the material of the emitter plate It was found that certain metals like zinc, cadmium, magnesium, etc ,
responded only to ultraviolet light, having short wavelength, to cause
electron emission from the surface However, some alkali metals such as
lithium, sodium, potassium, caesium and rubidium were sensitive
even to visible light |
9 | 1647-1650 | It was found that certain metals like zinc, cadmium, magnesium, etc ,
responded only to ultraviolet light, having short wavelength, to cause
electron emission from the surface However, some alkali metals such as
lithium, sodium, potassium, caesium and rubidium were sensitive
even to visible light All these photosensitive substances emit electrons
when they are illuminated by light |
9 | 1648-1651 | ,
responded only to ultraviolet light, having short wavelength, to cause
electron emission from the surface However, some alkali metals such as
lithium, sodium, potassium, caesium and rubidium were sensitive
even to visible light All these photosensitive substances emit electrons
when they are illuminated by light After the discovery of electrons, these
electrons were termed as photoelectrons |
9 | 1649-1652 | However, some alkali metals such as
lithium, sodium, potassium, caesium and rubidium were sensitive
even to visible light All these photosensitive substances emit electrons
when they are illuminated by light After the discovery of electrons, these
electrons were termed as photoelectrons The phenomenon is called
photoelectric effect |
9 | 1650-1653 | All these photosensitive substances emit electrons
when they are illuminated by light After the discovery of electrons, these
electrons were termed as photoelectrons The phenomenon is called
photoelectric effect 11 |
9 | 1651-1654 | After the discovery of electrons, these
electrons were termed as photoelectrons The phenomenon is called
photoelectric effect 11 4 EXPERIMENTAL STUDY OF PHOTOELECTRIC
EFFECT
Figure 11 |
9 | 1652-1655 | The phenomenon is called
photoelectric effect 11 4 EXPERIMENTAL STUDY OF PHOTOELECTRIC
EFFECT
Figure 11 1 depicts a schematic view of the arrangement used for the
experimental study of the photoelectric effect |
9 | 1653-1656 | 11 4 EXPERIMENTAL STUDY OF PHOTOELECTRIC
EFFECT
Figure 11 1 depicts a schematic view of the arrangement used for the
experimental study of the photoelectric effect It consists of an evacuated
glass/quartz tube having a thin photosensitive plate C and another metal
plate A |
9 | 1654-1657 | 4 EXPERIMENTAL STUDY OF PHOTOELECTRIC
EFFECT
Figure 11 1 depicts a schematic view of the arrangement used for the
experimental study of the photoelectric effect It consists of an evacuated
glass/quartz tube having a thin photosensitive plate C and another metal
plate A Monochromatic light from the source S of sufficiently short
wavelength passes through the window W and falls on the photosensitive
plate C (emitter) |
9 | 1655-1658 | 1 depicts a schematic view of the arrangement used for the
experimental study of the photoelectric effect It consists of an evacuated
glass/quartz tube having a thin photosensitive plate C and another metal
plate A Monochromatic light from the source S of sufficiently short
wavelength passes through the window W and falls on the photosensitive
plate C (emitter) A transparent quartz window is sealed on to the glass
tube, which permits ultraviolet radiation to pass through it and irradiate
the photosensitive plate C |
9 | 1656-1659 | It consists of an evacuated
glass/quartz tube having a thin photosensitive plate C and another metal
plate A Monochromatic light from the source S of sufficiently short
wavelength passes through the window W and falls on the photosensitive
plate C (emitter) A transparent quartz window is sealed on to the glass
tube, which permits ultraviolet radiation to pass through it and irradiate
the photosensitive plate C The electrons are emitted by the plate C and
are collected by the plate A (collector), by the electric field created by the
battery |
9 | 1657-1660 | Monochromatic light from the source S of sufficiently short
wavelength passes through the window W and falls on the photosensitive
plate C (emitter) A transparent quartz window is sealed on to the glass
tube, which permits ultraviolet radiation to pass through it and irradiate
the photosensitive plate C The electrons are emitted by the plate C and
are collected by the plate A (collector), by the electric field created by the
battery The battery maintains the potential difference between the plates
C and A, that can be varied |
9 | 1658-1661 | A transparent quartz window is sealed on to the glass
tube, which permits ultraviolet radiation to pass through it and irradiate
the photosensitive plate C The electrons are emitted by the plate C and
are collected by the plate A (collector), by the electric field created by the
battery The battery maintains the potential difference between the plates
C and A, that can be varied The polarity of the plates C and A can be
reversed by a commutator |
9 | 1659-1662 | The electrons are emitted by the plate C and
are collected by the plate A (collector), by the electric field created by the
battery The battery maintains the potential difference between the plates
C and A, that can be varied The polarity of the plates C and A can be
reversed by a commutator Thus, the plate A can be maintained at a desired
positive or negative potential with respect to emitter C |
9 | 1660-1663 | The battery maintains the potential difference between the plates
C and A, that can be varied The polarity of the plates C and A can be
reversed by a commutator Thus, the plate A can be maintained at a desired
positive or negative potential with respect to emitter C When the collector plate A is positive with respect to the
emitter plate C, the electrons are attracted to it |
9 | 1661-1664 | The polarity of the plates C and A can be
reversed by a commutator Thus, the plate A can be maintained at a desired
positive or negative potential with respect to emitter C When the collector plate A is positive with respect to the
emitter plate C, the electrons are attracted to it The
emission of electrons causes flow of electric current in
the circuit |
9 | 1662-1665 | Thus, the plate A can be maintained at a desired
positive or negative potential with respect to emitter C When the collector plate A is positive with respect to the
emitter plate C, the electrons are attracted to it The
emission of electrons causes flow of electric current in
the circuit The potential difference between the emitter
and collector plates is measured by a voltmeter (V)
whereas the resulting photo current flowing in the circuit
is measured by a microammeter (mA) |
9 | 1663-1666 | When the collector plate A is positive with respect to the
emitter plate C, the electrons are attracted to it The
emission of electrons causes flow of electric current in
the circuit The potential difference between the emitter
and collector plates is measured by a voltmeter (V)
whereas the resulting photo current flowing in the circuit
is measured by a microammeter (mA) The photoelectric
current can be increased or decreased by varying the
potential of collector plate A with respect to the emitter
plate C |
9 | 1664-1667 | The
emission of electrons causes flow of electric current in
the circuit The potential difference between the emitter
and collector plates is measured by a voltmeter (V)
whereas the resulting photo current flowing in the circuit
is measured by a microammeter (mA) The photoelectric
current can be increased or decreased by varying the
potential of collector plate A with respect to the emitter
plate C The intensity and frequency of the incident light
can be varied, as can the potential difference V between
the emitter C and the collector A |
9 | 1665-1668 | The potential difference between the emitter
and collector plates is measured by a voltmeter (V)
whereas the resulting photo current flowing in the circuit
is measured by a microammeter (mA) The photoelectric
current can be increased or decreased by varying the
potential of collector plate A with respect to the emitter
plate C The intensity and frequency of the incident light
can be varied, as can the potential difference V between
the emitter C and the collector A We can use the experimental arrangement of Fig |
9 | 1666-1669 | The photoelectric
current can be increased or decreased by varying the
potential of collector plate A with respect to the emitter
plate C The intensity and frequency of the incident light
can be varied, as can the potential difference V between
the emitter C and the collector A We can use the experimental arrangement of Fig 11 |
9 | 1667-1670 | The intensity and frequency of the incident light
can be varied, as can the potential difference V between
the emitter C and the collector A We can use the experimental arrangement of Fig 11 1 to study the variation of photocurrent with (a)
intensity of radiation, (b) frequency of incident radiation,
(c) the potential difference between the plates A and C,
and (d) the nature of the material of plate C |
9 | 1668-1671 | We can use the experimental arrangement of Fig 11 1 to study the variation of photocurrent with (a)
intensity of radiation, (b) frequency of incident radiation,
(c) the potential difference between the plates A and C,
and (d) the nature of the material of plate C Light of
different frequencies can be used by putting appropriate
coloured filter or coloured glass in the path of light falling
FIGURE 11 |
9 | 1669-1672 | 11 1 to study the variation of photocurrent with (a)
intensity of radiation, (b) frequency of incident radiation,
(c) the potential difference between the plates A and C,
and (d) the nature of the material of plate C Light of
different frequencies can be used by putting appropriate
coloured filter or coloured glass in the path of light falling
FIGURE 11 1 Experimental
arrangement for study of
photoelectric effect |
9 | 1670-1673 | 1 to study the variation of photocurrent with (a)
intensity of radiation, (b) frequency of incident radiation,
(c) the potential difference between the plates A and C,
and (d) the nature of the material of plate C Light of
different frequencies can be used by putting appropriate
coloured filter or coloured glass in the path of light falling
FIGURE 11 1 Experimental
arrangement for study of
photoelectric effect Rationalised 2023-24
Physics
278
on the emitter C |
9 | 1671-1674 | Light of
different frequencies can be used by putting appropriate
coloured filter or coloured glass in the path of light falling
FIGURE 11 1 Experimental
arrangement for study of
photoelectric effect Rationalised 2023-24
Physics
278
on the emitter C The intensity of light is varied by changing
the distance of the light source from the emitter |
9 | 1672-1675 | 1 Experimental
arrangement for study of
photoelectric effect Rationalised 2023-24
Physics
278
on the emitter C The intensity of light is varied by changing
the distance of the light source from the emitter 11 |
9 | 1673-1676 | Rationalised 2023-24
Physics
278
on the emitter C The intensity of light is varied by changing
the distance of the light source from the emitter 11 4 |
9 | 1674-1677 | The intensity of light is varied by changing
the distance of the light source from the emitter 11 4 1 Effect of intensity of light on photocurrent
The collector A is maintained at a positive potential with
respect to emitter C so that electrons ejected from C are
attracted towards collector A |
9 | 1675-1678 | 11 4 1 Effect of intensity of light on photocurrent
The collector A is maintained at a positive potential with
respect to emitter C so that electrons ejected from C are
attracted towards collector A Keeping the frequency of the
incident radiation and the potential fixed, the intensity of
light is varied and the resulting photoelectric current is
measured each time |
9 | 1676-1679 | 4 1 Effect of intensity of light on photocurrent
The collector A is maintained at a positive potential with
respect to emitter C so that electrons ejected from C are
attracted towards collector A Keeping the frequency of the
incident radiation and the potential fixed, the intensity of
light is varied and the resulting photoelectric current is
measured each time It is found that the photocurrent
increases linearly with intensity of incident light as shown
graphically in Fig |
9 | 1677-1680 | 1 Effect of intensity of light on photocurrent
The collector A is maintained at a positive potential with
respect to emitter C so that electrons ejected from C are
attracted towards collector A Keeping the frequency of the
incident radiation and the potential fixed, the intensity of
light is varied and the resulting photoelectric current is
measured each time It is found that the photocurrent
increases linearly with intensity of incident light as shown
graphically in Fig 11 |
9 | 1678-1681 | Keeping the frequency of the
incident radiation and the potential fixed, the intensity of
light is varied and the resulting photoelectric current is
measured each time It is found that the photocurrent
increases linearly with intensity of incident light as shown
graphically in Fig 11 2 |
9 | 1679-1682 | It is found that the photocurrent
increases linearly with intensity of incident light as shown
graphically in Fig 11 2 The photocurrent is directly
proportional to the number of photoelectrons emitted per
second |
9 | 1680-1683 | 11 2 The photocurrent is directly
proportional to the number of photoelectrons emitted per
second This implies that the number of photoelectrons
emitted per second is directly proportional to the intensity
of incident radiation |
9 | 1681-1684 | 2 The photocurrent is directly
proportional to the number of photoelectrons emitted per
second This implies that the number of photoelectrons
emitted per second is directly proportional to the intensity
of incident radiation 11 |
9 | 1682-1685 | The photocurrent is directly
proportional to the number of photoelectrons emitted per
second This implies that the number of photoelectrons
emitted per second is directly proportional to the intensity
of incident radiation 11 4 |
9 | 1683-1686 | This implies that the number of photoelectrons
emitted per second is directly proportional to the intensity
of incident radiation 11 4 2 Effect of potential on photoelectric current
We first keep the plate A at some positive potential with respect to the
plate C and illuminate the plate C with light of fixed frequency n and fixed
intensity I1 |
9 | 1684-1687 | 11 4 2 Effect of potential on photoelectric current
We first keep the plate A at some positive potential with respect to the
plate C and illuminate the plate C with light of fixed frequency n and fixed
intensity I1 We next vary the positive potential of plate A gradually and
measure the resulting photocurrent each time |
9 | 1685-1688 | 4 2 Effect of potential on photoelectric current
We first keep the plate A at some positive potential with respect to the
plate C and illuminate the plate C with light of fixed frequency n and fixed
intensity I1 We next vary the positive potential of plate A gradually and
measure the resulting photocurrent each time It is found that the
photoelectric current increases with increase in positive (accelerating)
potential |
9 | 1686-1689 | 2 Effect of potential on photoelectric current
We first keep the plate A at some positive potential with respect to the
plate C and illuminate the plate C with light of fixed frequency n and fixed
intensity I1 We next vary the positive potential of plate A gradually and
measure the resulting photocurrent each time It is found that the
photoelectric current increases with increase in positive (accelerating)
potential At some stage, for a certain positive potential of plate A, all the
emitted electrons are collected by the plate A and the photoelectric current
becomes maximum or saturates |
9 | 1687-1690 | We next vary the positive potential of plate A gradually and
measure the resulting photocurrent each time It is found that the
photoelectric current increases with increase in positive (accelerating)
potential At some stage, for a certain positive potential of plate A, all the
emitted electrons are collected by the plate A and the photoelectric current
becomes maximum or saturates If we increase the accelerating potential
of plate A further, the photocurrent does not increase |
9 | 1688-1691 | It is found that the
photoelectric current increases with increase in positive (accelerating)
potential At some stage, for a certain positive potential of plate A, all the
emitted electrons are collected by the plate A and the photoelectric current
becomes maximum or saturates If we increase the accelerating potential
of plate A further, the photocurrent does not increase This maximum
value of the photoelectric current is called saturation current |
9 | 1689-1692 | At some stage, for a certain positive potential of plate A, all the
emitted electrons are collected by the plate A and the photoelectric current
becomes maximum or saturates If we increase the accelerating potential
of plate A further, the photocurrent does not increase This maximum
value of the photoelectric current is called saturation current Saturation
current corresponds to the case when all the photoelectrons emitted by
the emitter plate C reach the collector plate A |
9 | 1690-1693 | If we increase the accelerating potential
of plate A further, the photocurrent does not increase This maximum
value of the photoelectric current is called saturation current Saturation
current corresponds to the case when all the photoelectrons emitted by
the emitter plate C reach the collector plate A We now apply a negative (retarding)
potential to the plate A with respect to the
plate C and make it increasingly negative
gradually |
9 | 1691-1694 | This maximum
value of the photoelectric current is called saturation current Saturation
current corresponds to the case when all the photoelectrons emitted by
the emitter plate C reach the collector plate A We now apply a negative (retarding)
potential to the plate A with respect to the
plate C and make it increasingly negative
gradually When the polarity is reversed,
the electrons are repelled and only the
sufficiently energetic electrons are able to
reach the collector A |
9 | 1692-1695 | Saturation
current corresponds to the case when all the photoelectrons emitted by
the emitter plate C reach the collector plate A We now apply a negative (retarding)
potential to the plate A with respect to the
plate C and make it increasingly negative
gradually When the polarity is reversed,
the electrons are repelled and only the
sufficiently energetic electrons are able to
reach the collector A The photocurrent
is found to decrease rapidly until it drops
to zero at a certain sharply defined,
critical value of the negative potential V0
on the plate A |
9 | 1693-1696 | We now apply a negative (retarding)
potential to the plate A with respect to the
plate C and make it increasingly negative
gradually When the polarity is reversed,
the electrons are repelled and only the
sufficiently energetic electrons are able to
reach the collector A The photocurrent
is found to decrease rapidly until it drops
to zero at a certain sharply defined,
critical value of the negative potential V0
on the plate A For a particular frequency
of incident radiation, the minimum
negative (retarding) potential V0 given to
the plate A for which the photocurrent
stops or becomes zero is called the cut-
off or stopping potential |
9 | 1694-1697 | When the polarity is reversed,
the electrons are repelled and only the
sufficiently energetic electrons are able to
reach the collector A The photocurrent
is found to decrease rapidly until it drops
to zero at a certain sharply defined,
critical value of the negative potential V0
on the plate A For a particular frequency
of incident radiation, the minimum
negative (retarding) potential V0 given to
the plate A for which the photocurrent
stops or becomes zero is called the cut-
off or stopping potential in The interpretation of the observation
terms
of
photoelectrons
is
straightforward |
9 | 1695-1698 | The photocurrent
is found to decrease rapidly until it drops
to zero at a certain sharply defined,
critical value of the negative potential V0
on the plate A For a particular frequency
of incident radiation, the minimum
negative (retarding) potential V0 given to
the plate A for which the photocurrent
stops or becomes zero is called the cut-
off or stopping potential in The interpretation of the observation
terms
of
photoelectrons
is
straightforward All the photoelectrons
emitted from the metal do not have the
FIGURE 11 |
9 | 1696-1699 | For a particular frequency
of incident radiation, the minimum
negative (retarding) potential V0 given to
the plate A for which the photocurrent
stops or becomes zero is called the cut-
off or stopping potential in The interpretation of the observation
terms
of
photoelectrons
is
straightforward All the photoelectrons
emitted from the metal do not have the
FIGURE 11 2 Variation of
Photoelectric current with
intensity of light |
9 | 1697-1700 | in The interpretation of the observation
terms
of
photoelectrons
is
straightforward All the photoelectrons
emitted from the metal do not have the
FIGURE 11 2 Variation of
Photoelectric current with
intensity of light FIGURE 11 |
9 | 1698-1701 | All the photoelectrons
emitted from the metal do not have the
FIGURE 11 2 Variation of
Photoelectric current with
intensity of light FIGURE 11 3 Variation of photocurrent with
collector plate potential for different
intensity of incident radiation |
9 | 1699-1702 | 2 Variation of
Photoelectric current with
intensity of light FIGURE 11 3 Variation of photocurrent with
collector plate potential for different
intensity of incident radiation Rationalised 2023-24
279
Dual Nature of Radiation
and Matter
same energy |
9 | 1700-1703 | FIGURE 11 3 Variation of photocurrent with
collector plate potential for different
intensity of incident radiation Rationalised 2023-24
279
Dual Nature of Radiation
and Matter
same energy Photoelectric current is zero when the stopping potential is
sufficient to repel even the most energetic photoelectrons, with the
maximum kinetic energy (Kmax), so that
Kmax = e V0
(11 |
9 | 1701-1704 | 3 Variation of photocurrent with
collector plate potential for different
intensity of incident radiation Rationalised 2023-24
279
Dual Nature of Radiation
and Matter
same energy Photoelectric current is zero when the stopping potential is
sufficient to repel even the most energetic photoelectrons, with the
maximum kinetic energy (Kmax), so that
Kmax = e V0
(11 1)
We can now repeat this experiment with incident radiation of the same
frequency but of higher intensity I2 and I3 (I3 > I2 > I1) |
9 | 1702-1705 | Rationalised 2023-24
279
Dual Nature of Radiation
and Matter
same energy Photoelectric current is zero when the stopping potential is
sufficient to repel even the most energetic photoelectrons, with the
maximum kinetic energy (Kmax), so that
Kmax = e V0
(11 1)
We can now repeat this experiment with incident radiation of the same
frequency but of higher intensity I2 and I3 (I3 > I2 > I1) We note that the
saturation currents are now found to be at higher values |
9 | 1703-1706 | Photoelectric current is zero when the stopping potential is
sufficient to repel even the most energetic photoelectrons, with the
maximum kinetic energy (Kmax), so that
Kmax = e V0
(11 1)
We can now repeat this experiment with incident radiation of the same
frequency but of higher intensity I2 and I3 (I3 > I2 > I1) We note that the
saturation currents are now found to be at higher values This shows
that more electrons are being emitted per second, proportional to the
intensity of incident radiation |
9 | 1704-1707 | 1)
We can now repeat this experiment with incident radiation of the same
frequency but of higher intensity I2 and I3 (I3 > I2 > I1) We note that the
saturation currents are now found to be at higher values This shows
that more electrons are being emitted per second, proportional to the
intensity of incident radiation But the stopping potential remains the
same as that for the incident radiation of intensity I1, as shown graphically
in Fig |
9 | 1705-1708 | We note that the
saturation currents are now found to be at higher values This shows
that more electrons are being emitted per second, proportional to the
intensity of incident radiation But the stopping potential remains the
same as that for the incident radiation of intensity I1, as shown graphically
in Fig 11 |
9 | 1706-1709 | This shows
that more electrons are being emitted per second, proportional to the
intensity of incident radiation But the stopping potential remains the
same as that for the incident radiation of intensity I1, as shown graphically
in Fig 11 3 |
9 | 1707-1710 | But the stopping potential remains the
same as that for the incident radiation of intensity I1, as shown graphically
in Fig 11 3 Thus, for a given frequency of the incident radiation, the
stopping potential is independent of its intensity |
9 | 1708-1711 | 11 3 Thus, for a given frequency of the incident radiation, the
stopping potential is independent of its intensity In other words, the
maximum kinetic energy of photoelectrons depends on the light source
and the emitter plate material, but is independent of intensity of incident
radiation |
9 | 1709-1712 | 3 Thus, for a given frequency of the incident radiation, the
stopping potential is independent of its intensity In other words, the
maximum kinetic energy of photoelectrons depends on the light source
and the emitter plate material, but is independent of intensity of incident
radiation 11 |
9 | 1710-1713 | Thus, for a given frequency of the incident radiation, the
stopping potential is independent of its intensity In other words, the
maximum kinetic energy of photoelectrons depends on the light source
and the emitter plate material, but is independent of intensity of incident
radiation 11 4 |
9 | 1711-1714 | In other words, the
maximum kinetic energy of photoelectrons depends on the light source
and the emitter plate material, but is independent of intensity of incident
radiation 11 4 3 Effect of frequency of incident radiation on
stopping potential
FIGURE 11 |
9 | 1712-1715 | 11 4 3 Effect of frequency of incident radiation on
stopping potential
FIGURE 11 4 Variation of photoelectric current
with collector plate potential for different
frequencies of incident radiation |
9 | 1713-1716 | 4 3 Effect of frequency of incident radiation on
stopping potential
FIGURE 11 4 Variation of photoelectric current
with collector plate potential for different
frequencies of incident radiation FIGURE 11 |
9 | 1714-1717 | 3 Effect of frequency of incident radiation on
stopping potential
FIGURE 11 4 Variation of photoelectric current
with collector plate potential for different
frequencies of incident radiation FIGURE 11 5 Variation of stopping potential V0
with frequency n of incident radiation for a
given photosensitive material |
9 | 1715-1718 | 4 Variation of photoelectric current
with collector plate potential for different
frequencies of incident radiation FIGURE 11 5 Variation of stopping potential V0
with frequency n of incident radiation for a
given photosensitive material We now study the relation between the frequency
n of the incident radiation and the stopping
potential V0 |
9 | 1716-1719 | FIGURE 11 5 Variation of stopping potential V0
with frequency n of incident radiation for a
given photosensitive material We now study the relation between the frequency
n of the incident radiation and the stopping
potential V0 We suitably adjust the same
intensity of light radiation at various frequencies
and study the variation of photocurrent with
collector plate potential |
9 | 1717-1720 | 5 Variation of stopping potential V0
with frequency n of incident radiation for a
given photosensitive material We now study the relation between the frequency
n of the incident radiation and the stopping
potential V0 We suitably adjust the same
intensity of light radiation at various frequencies
and study the variation of photocurrent with
collector plate potential The resulting variation
is shown in Fig |
9 | 1718-1721 | We now study the relation between the frequency
n of the incident radiation and the stopping
potential V0 We suitably adjust the same
intensity of light radiation at various frequencies
and study the variation of photocurrent with
collector plate potential The resulting variation
is shown in Fig 11 |
9 | 1719-1722 | We suitably adjust the same
intensity of light radiation at various frequencies
and study the variation of photocurrent with
collector plate potential The resulting variation
is shown in Fig 11 4 |
9 | 1720-1723 | The resulting variation
is shown in Fig 11 4 We obtain different values
of stopping potential but the same value of the
saturation current for incident radiation of
different frequencies |
9 | 1721-1724 | 11 4 We obtain different values
of stopping potential but the same value of the
saturation current for incident radiation of
different frequencies The energy of the emitted
electrons depends on the frequency of the
incident radiations |
9 | 1722-1725 | 4 We obtain different values
of stopping potential but the same value of the
saturation current for incident radiation of
different frequencies The energy of the emitted
electrons depends on the frequency of the
incident radiations The stopping potential is
more negative for higher frequencies of incident
radiation |
9 | 1723-1726 | We obtain different values
of stopping potential but the same value of the
saturation current for incident radiation of
different frequencies The energy of the emitted
electrons depends on the frequency of the
incident radiations The stopping potential is
more negative for higher frequencies of incident
radiation Note from Fig |
9 | 1724-1727 | The energy of the emitted
electrons depends on the frequency of the
incident radiations The stopping potential is
more negative for higher frequencies of incident
radiation Note from Fig 11 |
9 | 1725-1728 | The stopping potential is
more negative for higher frequencies of incident
radiation Note from Fig 11 4 that the stopping
potentials are in the order V03 > V02 > V01 if the
frequencies are in the order n3 > n2 > n1 |
9 | 1726-1729 | Note from Fig 11 4 that the stopping
potentials are in the order V03 > V02 > V01 if the
frequencies are in the order n3 > n2 > n1 This
implies that greater the frequency of incident
light, greater is the maximum kinetic energy of
the photoelectrons |
9 | 1727-1730 | 11 4 that the stopping
potentials are in the order V03 > V02 > V01 if the
frequencies are in the order n3 > n2 > n1 This
implies that greater the frequency of incident
light, greater is the maximum kinetic energy of
the photoelectrons Consequently, we need
greater retarding potential to stop them
completely |
9 | 1728-1731 | 4 that the stopping
potentials are in the order V03 > V02 > V01 if the
frequencies are in the order n3 > n2 > n1 This
implies that greater the frequency of incident
light, greater is the maximum kinetic energy of
the photoelectrons Consequently, we need
greater retarding potential to stop them
completely If we plot a graph between the
frequency of incident radiation and the
corresponding stopping potential for different
metals we get a straight line, as shown in Fig |
9 | 1729-1732 | This
implies that greater the frequency of incident
light, greater is the maximum kinetic energy of
the photoelectrons Consequently, we need
greater retarding potential to stop them
completely If we plot a graph between the
frequency of incident radiation and the
corresponding stopping potential for different
metals we get a straight line, as shown in Fig 11 |
9 | 1730-1733 | Consequently, we need
greater retarding potential to stop them
completely If we plot a graph between the
frequency of incident radiation and the
corresponding stopping potential for different
metals we get a straight line, as shown in Fig 11 5 |
9 | 1731-1734 | If we plot a graph between the
frequency of incident radiation and the
corresponding stopping potential for different
metals we get a straight line, as shown in Fig 11 5 The graph shows that
(i)
the stopping potential V0 varies linearly with
the frequency of incident radiation for a given
photosensitive material |
9 | 1732-1735 | 11 5 The graph shows that
(i)
the stopping potential V0 varies linearly with
the frequency of incident radiation for a given
photosensitive material (ii) there exists a certain minimum cut-off
frequency n0 for which the stopping potential
is zero |
9 | 1733-1736 | 5 The graph shows that
(i)
the stopping potential V0 varies linearly with
the frequency of incident radiation for a given
photosensitive material (ii) there exists a certain minimum cut-off
frequency n0 for which the stopping potential
is zero Rationalised 2023-24
Physics
280
These observations have two implications:
(i)
The maximum kinetic energy of the photoelectrons varies linearly
with the frequency of incident radiation, but is independent of its
intensity |
9 | 1734-1737 | The graph shows that
(i)
the stopping potential V0 varies linearly with
the frequency of incident radiation for a given
photosensitive material (ii) there exists a certain minimum cut-off
frequency n0 for which the stopping potential
is zero Rationalised 2023-24
Physics
280
These observations have two implications:
(i)
The maximum kinetic energy of the photoelectrons varies linearly
with the frequency of incident radiation, but is independent of its
intensity (ii) For a frequency n of incident radiation, lower than the cut-off
frequency n0, no photoelectric emission is possible even if the
intensity is large |
9 | 1735-1738 | (ii) there exists a certain minimum cut-off
frequency n0 for which the stopping potential
is zero Rationalised 2023-24
Physics
280
These observations have two implications:
(i)
The maximum kinetic energy of the photoelectrons varies linearly
with the frequency of incident radiation, but is independent of its
intensity (ii) For a frequency n of incident radiation, lower than the cut-off
frequency n0, no photoelectric emission is possible even if the
intensity is large This minimum, cut-off frequency n0, is called the threshold frequency |
9 | 1736-1739 | Rationalised 2023-24
Physics
280
These observations have two implications:
(i)
The maximum kinetic energy of the photoelectrons varies linearly
with the frequency of incident radiation, but is independent of its
intensity (ii) For a frequency n of incident radiation, lower than the cut-off
frequency n0, no photoelectric emission is possible even if the
intensity is large This minimum, cut-off frequency n0, is called the threshold frequency It is different for different metals |
9 | 1737-1740 | (ii) For a frequency n of incident radiation, lower than the cut-off
frequency n0, no photoelectric emission is possible even if the
intensity is large This minimum, cut-off frequency n0, is called the threshold frequency It is different for different metals Different photosensitive materials respond differently to light |
9 | 1738-1741 | This minimum, cut-off frequency n0, is called the threshold frequency It is different for different metals Different photosensitive materials respond differently to light Selenium
is more sensitive than zinc or copper |
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