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1 | 6290-6293 | This
is a general feature In Fig 8 3, we show a typical example of a plane
electromagnetic wave propagating along the z direction
(the fields are shown as a function of the z coordinate, at
a given time t) |
1 | 6291-6294 | In Fig 8 3, we show a typical example of a plane
electromagnetic wave propagating along the z direction
(the fields are shown as a function of the z coordinate, at
a given time t) The electric field Ex is along the x-axis,
and varies sinusoidally with z, at a given time |
1 | 6292-6295 | 8 3, we show a typical example of a plane
electromagnetic wave propagating along the z direction
(the fields are shown as a function of the z coordinate, at
a given time t) The electric field Ex is along the x-axis,
and varies sinusoidally with z, at a given time The
magnetic field By is along the y-axis, and again varies
sinusoidally with z |
1 | 6293-6296 | 3, we show a typical example of a plane
electromagnetic wave propagating along the z direction
(the fields are shown as a function of the z coordinate, at
a given time t) The electric field Ex is along the x-axis,
and varies sinusoidally with z, at a given time The
magnetic field By is along the y-axis, and again varies
sinusoidally with z The electric and magnetic fields Ex
and By are perpendicular to each
other, and to the direction z of
propagation |
1 | 6294-6297 | The electric field Ex is along the x-axis,
and varies sinusoidally with z, at a given time The
magnetic field By is along the y-axis, and again varies
sinusoidally with z The electric and magnetic fields Ex
and By are perpendicular to each
other, and to the direction z of
propagation We can write Ex and
By as follows:
Ex= E0 sin (kz–wt)
[8 |
1 | 6295-6298 | The
magnetic field By is along the y-axis, and again varies
sinusoidally with z The electric and magnetic fields Ex
and By are perpendicular to each
other, and to the direction z of
propagation We can write Ex and
By as follows:
Ex= E0 sin (kz–wt)
[8 7(a)]
By= B0 sin (kz–wt)
[8 |
1 | 6296-6299 | The electric and magnetic fields Ex
and By are perpendicular to each
other, and to the direction z of
propagation We can write Ex and
By as follows:
Ex= E0 sin (kz–wt)
[8 7(a)]
By= B0 sin (kz–wt)
[8 7(b)]
Here k is related to the wave length
l of the wave by the usual
equation
2
k
λ
π
=
(8 |
1 | 6297-6300 | We can write Ex and
By as follows:
Ex= E0 sin (kz–wt)
[8 7(a)]
By= B0 sin (kz–wt)
[8 7(b)]
Here k is related to the wave length
l of the wave by the usual
equation
2
k
λ
π
=
(8 8)
EXAMPLE 8 |
1 | 6298-6301 | 7(a)]
By= B0 sin (kz–wt)
[8 7(b)]
Here k is related to the wave length
l of the wave by the usual
equation
2
k
λ
π
=
(8 8)
EXAMPLE 8 1
Heinrich Rudolf Hertz
(1857 – 1894) German
physicist who was the
first to broadcast and
receive radio waves |
1 | 6299-6302 | 7(b)]
Here k is related to the wave length
l of the wave by the usual
equation
2
k
λ
π
=
(8 8)
EXAMPLE 8 1
Heinrich Rudolf Hertz
(1857 – 1894) German
physicist who was the
first to broadcast and
receive radio waves He
produced
electro-
magnetic waves, sent
them through space, and
measured their wave-
length and speed |
1 | 6300-6303 | 8)
EXAMPLE 8 1
Heinrich Rudolf Hertz
(1857 – 1894) German
physicist who was the
first to broadcast and
receive radio waves He
produced
electro-
magnetic waves, sent
them through space, and
measured their wave-
length and speed He
showed that the nature
of
their
vibration,
reflection and refraction
was the same as that of
light and heat waves,
establishing
their
identity for the first time |
1 | 6301-6304 | 1
Heinrich Rudolf Hertz
(1857 – 1894) German
physicist who was the
first to broadcast and
receive radio waves He
produced
electro-
magnetic waves, sent
them through space, and
measured their wave-
length and speed He
showed that the nature
of
their
vibration,
reflection and refraction
was the same as that of
light and heat waves,
establishing
their
identity for the first time He
also
pioneered
research on discharge of
electricity through gases,
and
discovered
the
photoelectric effect |
1 | 6302-6305 | He
produced
electro-
magnetic waves, sent
them through space, and
measured their wave-
length and speed He
showed that the nature
of
their
vibration,
reflection and refraction
was the same as that of
light and heat waves,
establishing
their
identity for the first time He
also
pioneered
research on discharge of
electricity through gases,
and
discovered
the
photoelectric effect HEINRICH RUDOLF HERTZ (1857–1894)
FIGURE 8 |
1 | 6303-6306 | He
showed that the nature
of
their
vibration,
reflection and refraction
was the same as that of
light and heat waves,
establishing
their
identity for the first time He
also
pioneered
research on discharge of
electricity through gases,
and
discovered
the
photoelectric effect HEINRICH RUDOLF HERTZ (1857–1894)
FIGURE 8 3 A linearly polarised electromagnetic wave,
propagating in the z-direction with the oscillating electric field E
along the x-direction and the oscillating magnetic field B along
the y-direction |
1 | 6304-6307 | He
also
pioneered
research on discharge of
electricity through gases,
and
discovered
the
photoelectric effect HEINRICH RUDOLF HERTZ (1857–1894)
FIGURE 8 3 A linearly polarised electromagnetic wave,
propagating in the z-direction with the oscillating electric field E
along the x-direction and the oscillating magnetic field B along
the y-direction Rationalised 2023-24
207
Electromagnetic
Waves
and w is the angular frequency |
1 | 6305-6308 | HEINRICH RUDOLF HERTZ (1857–1894)
FIGURE 8 3 A linearly polarised electromagnetic wave,
propagating in the z-direction with the oscillating electric field E
along the x-direction and the oscillating magnetic field B along
the y-direction Rationalised 2023-24
207
Electromagnetic
Waves
and w is the angular frequency k is the magnitude of the wave vector (or
propagation vector) k and its direction describes the direction of
propagation of the wave |
1 | 6306-6309 | 3 A linearly polarised electromagnetic wave,
propagating in the z-direction with the oscillating electric field E
along the x-direction and the oscillating magnetic field B along
the y-direction Rationalised 2023-24
207
Electromagnetic
Waves
and w is the angular frequency k is the magnitude of the wave vector (or
propagation vector) k and its direction describes the direction of
propagation of the wave The speed of propagation of the wave is (w/k) |
1 | 6307-6310 | Rationalised 2023-24
207
Electromagnetic
Waves
and w is the angular frequency k is the magnitude of the wave vector (or
propagation vector) k and its direction describes the direction of
propagation of the wave The speed of propagation of the wave is (w/k) Using Eqs |
1 | 6308-6311 | k is the magnitude of the wave vector (or
propagation vector) k and its direction describes the direction of
propagation of the wave The speed of propagation of the wave is (w/k) Using Eqs [8 |
1 | 6309-6312 | The speed of propagation of the wave is (w/k) Using Eqs [8 7(a) and (b)] for Ex and By and Maxwell’s equations, one
finds that
w = ck, where, c = 1/
0
µ ε0
[8 |
1 | 6310-6313 | Using Eqs [8 7(a) and (b)] for Ex and By and Maxwell’s equations, one
finds that
w = ck, where, c = 1/
0
µ ε0
[8 9(a)]
The relation w = ck is the standard one for waves (see for example,
Section 15 |
1 | 6311-6314 | [8 7(a) and (b)] for Ex and By and Maxwell’s equations, one
finds that
w = ck, where, c = 1/
0
µ ε0
[8 9(a)]
The relation w = ck is the standard one for waves (see for example,
Section 15 4 of class XI Physics textbook) |
1 | 6312-6315 | 7(a) and (b)] for Ex and By and Maxwell’s equations, one
finds that
w = ck, where, c = 1/
0
µ ε0
[8 9(a)]
The relation w = ck is the standard one for waves (see for example,
Section 15 4 of class XI Physics textbook) This relation is often written
in terms of frequency, n (=w/2p) and wavelength, l (=2p/k) as
2
2
πν
λ
=
c
π
or
nl = c
[8 |
1 | 6313-6316 | 9(a)]
The relation w = ck is the standard one for waves (see for example,
Section 15 4 of class XI Physics textbook) This relation is often written
in terms of frequency, n (=w/2p) and wavelength, l (=2p/k) as
2
2
πν
λ
=
c
π
or
nl = c
[8 9(b)]
It is also seen from Maxwell’s equations that the magnitude of the
electric and the magnetic fields in an electromagnetic wave are related as
B0 = (E0/c)
(8 |
1 | 6314-6317 | 4 of class XI Physics textbook) This relation is often written
in terms of frequency, n (=w/2p) and wavelength, l (=2p/k) as
2
2
πν
λ
=
c
π
or
nl = c
[8 9(b)]
It is also seen from Maxwell’s equations that the magnitude of the
electric and the magnetic fields in an electromagnetic wave are related as
B0 = (E0/c)
(8 10)
We here make remarks on some features of electromagnetic waves |
1 | 6315-6318 | This relation is often written
in terms of frequency, n (=w/2p) and wavelength, l (=2p/k) as
2
2
πν
λ
=
c
π
or
nl = c
[8 9(b)]
It is also seen from Maxwell’s equations that the magnitude of the
electric and the magnetic fields in an electromagnetic wave are related as
B0 = (E0/c)
(8 10)
We here make remarks on some features of electromagnetic waves They are self-sustaining oscillations of electric and magnetic fields in
free space, or vacuum |
1 | 6316-6319 | 9(b)]
It is also seen from Maxwell’s equations that the magnitude of the
electric and the magnetic fields in an electromagnetic wave are related as
B0 = (E0/c)
(8 10)
We here make remarks on some features of electromagnetic waves They are self-sustaining oscillations of electric and magnetic fields in
free space, or vacuum They differ from all the other waves we have
studied so far, in respect that no material medium is involved in the
vibrations of the electric and magnetic fields |
1 | 6317-6320 | 10)
We here make remarks on some features of electromagnetic waves They are self-sustaining oscillations of electric and magnetic fields in
free space, or vacuum They differ from all the other waves we have
studied so far, in respect that no material medium is involved in the
vibrations of the electric and magnetic fields But what if a material medium is actually there |
1 | 6318-6321 | They are self-sustaining oscillations of electric and magnetic fields in
free space, or vacuum They differ from all the other waves we have
studied so far, in respect that no material medium is involved in the
vibrations of the electric and magnetic fields But what if a material medium is actually there We know that light,
an electromagnetic wave, does propagate through glass, for example |
1 | 6319-6322 | They differ from all the other waves we have
studied so far, in respect that no material medium is involved in the
vibrations of the electric and magnetic fields But what if a material medium is actually there We know that light,
an electromagnetic wave, does propagate through glass, for example We
have seen earlier that the total electric and magnetic fields inside a
medium are described in terms of a permittivity e and a magnetic
permeability m (these describe the factors by which the total fields differ
from the external fields) |
1 | 6320-6323 | But what if a material medium is actually there We know that light,
an electromagnetic wave, does propagate through glass, for example We
have seen earlier that the total electric and magnetic fields inside a
medium are described in terms of a permittivity e and a magnetic
permeability m (these describe the factors by which the total fields differ
from the external fields) These replace e0 and m0 in the description to
electric and magnetic fields in Maxwell’s equations with the result that in
a material medium of permittivity e and magnetic permeability m, the
velocity of light becomes,
1
v
µε
=
(8 |
1 | 6321-6324 | We know that light,
an electromagnetic wave, does propagate through glass, for example We
have seen earlier that the total electric and magnetic fields inside a
medium are described in terms of a permittivity e and a magnetic
permeability m (these describe the factors by which the total fields differ
from the external fields) These replace e0 and m0 in the description to
electric and magnetic fields in Maxwell’s equations with the result that in
a material medium of permittivity e and magnetic permeability m, the
velocity of light becomes,
1
v
µε
=
(8 11)
Thus, the velocity of light depends on electric and magnetic properties of
the medium |
1 | 6322-6325 | We
have seen earlier that the total electric and magnetic fields inside a
medium are described in terms of a permittivity e and a magnetic
permeability m (these describe the factors by which the total fields differ
from the external fields) These replace e0 and m0 in the description to
electric and magnetic fields in Maxwell’s equations with the result that in
a material medium of permittivity e and magnetic permeability m, the
velocity of light becomes,
1
v
µε
=
(8 11)
Thus, the velocity of light depends on electric and magnetic properties of
the medium We shall see in the next chapter that the refractive index of
one medium with respect to the other is equal to the ratio of velocities of
light in the two media |
1 | 6323-6326 | These replace e0 and m0 in the description to
electric and magnetic fields in Maxwell’s equations with the result that in
a material medium of permittivity e and magnetic permeability m, the
velocity of light becomes,
1
v
µε
=
(8 11)
Thus, the velocity of light depends on electric and magnetic properties of
the medium We shall see in the next chapter that the refractive index of
one medium with respect to the other is equal to the ratio of velocities of
light in the two media The velocity of electromagnetic waves in free space or vacuum is an
important fundamental constant |
1 | 6324-6327 | 11)
Thus, the velocity of light depends on electric and magnetic properties of
the medium We shall see in the next chapter that the refractive index of
one medium with respect to the other is equal to the ratio of velocities of
light in the two media The velocity of electromagnetic waves in free space or vacuum is an
important fundamental constant It has been shown by experiments on
electromagnetic waves of different wavelengths that this velocity is the
same (independent of wavelength) to within a few metres per second, out
of a value of 3×108 m/s |
1 | 6325-6328 | We shall see in the next chapter that the refractive index of
one medium with respect to the other is equal to the ratio of velocities of
light in the two media The velocity of electromagnetic waves in free space or vacuum is an
important fundamental constant It has been shown by experiments on
electromagnetic waves of different wavelengths that this velocity is the
same (independent of wavelength) to within a few metres per second, out
of a value of 3×108 m/s The constancy of the velocity of em waves in
vacuum is so strongly supported by experiments and the actual value is
so well known now that this is used to define a standard of length |
1 | 6326-6329 | The velocity of electromagnetic waves in free space or vacuum is an
important fundamental constant It has been shown by experiments on
electromagnetic waves of different wavelengths that this velocity is the
same (independent of wavelength) to within a few metres per second, out
of a value of 3×108 m/s The constancy of the velocity of em waves in
vacuum is so strongly supported by experiments and the actual value is
so well known now that this is used to define a standard of length The great technological importance of electromagnetic waves stems
from their capability to carry energy from one place to another |
1 | 6327-6330 | It has been shown by experiments on
electromagnetic waves of different wavelengths that this velocity is the
same (independent of wavelength) to within a few metres per second, out
of a value of 3×108 m/s The constancy of the velocity of em waves in
vacuum is so strongly supported by experiments and the actual value is
so well known now that this is used to define a standard of length The great technological importance of electromagnetic waves stems
from their capability to carry energy from one place to another The
radio and TV signals from broadcasting stations carry energy |
1 | 6328-6331 | The constancy of the velocity of em waves in
vacuum is so strongly supported by experiments and the actual value is
so well known now that this is used to define a standard of length The great technological importance of electromagnetic waves stems
from their capability to carry energy from one place to another The
radio and TV signals from broadcasting stations carry energy Light
carries energy from the sun to the earth, thus making life possible on
the earth |
1 | 6329-6332 | The great technological importance of electromagnetic waves stems
from their capability to carry energy from one place to another The
radio and TV signals from broadcasting stations carry energy Light
carries energy from the sun to the earth, thus making life possible on
the earth Rationalised 2023-24
Physics
208
EXAMPLE 8 |
1 | 6330-6333 | The
radio and TV signals from broadcasting stations carry energy Light
carries energy from the sun to the earth, thus making life possible on
the earth Rationalised 2023-24
Physics
208
EXAMPLE 8 2
EXAMPLE 8 |
1 | 6331-6334 | Light
carries energy from the sun to the earth, thus making life possible on
the earth Rationalised 2023-24
Physics
208
EXAMPLE 8 2
EXAMPLE 8 1
Example 8 |
1 | 6332-6335 | Rationalised 2023-24
Physics
208
EXAMPLE 8 2
EXAMPLE 8 1
Example 8 1 A plane electromagnetic wave of frequency
25 MHz travels in free space along the x-direction |
1 | 6333-6336 | 2
EXAMPLE 8 1
Example 8 1 A plane electromagnetic wave of frequency
25 MHz travels in free space along the x-direction At a particular
point in space and time, E = 6 |
1 | 6334-6337 | 1
Example 8 1 A plane electromagnetic wave of frequency
25 MHz travels in free space along the x-direction At a particular
point in space and time, E = 6 3 ˆj V/m |
1 | 6335-6338 | 1 A plane electromagnetic wave of frequency
25 MHz travels in free space along the x-direction At a particular
point in space and time, E = 6 3 ˆj V/m What is B at this point |
1 | 6336-6339 | At a particular
point in space and time, E = 6 3 ˆj V/m What is B at this point Solution Using Eq |
1 | 6337-6340 | 3 ˆj V/m What is B at this point Solution Using Eq (8 |
1 | 6338-6341 | What is B at this point Solution Using Eq (8 10), the magnitude of B is
–8
8
6 |
1 | 6339-6342 | Solution Using Eq (8 10), the magnitude of B is
–8
8
6 3 V/m
2 |
1 | 6340-6343 | (8 10), the magnitude of B is
–8
8
6 3 V/m
2 1 10
T
3 10 m/s
E
B
c
=
=
=
×
×
To find the direction, we note that E is along y-direction and the
wave propagates along x-axis |
1 | 6341-6344 | 10), the magnitude of B is
–8
8
6 3 V/m
2 1 10
T
3 10 m/s
E
B
c
=
=
=
×
×
To find the direction, we note that E is along y-direction and the
wave propagates along x-axis Therefore, B should be in a direction
perpendicular to both x- and y-axes |
1 | 6342-6345 | 3 V/m
2 1 10
T
3 10 m/s
E
B
c
=
=
=
×
×
To find the direction, we note that E is along y-direction and the
wave propagates along x-axis Therefore, B should be in a direction
perpendicular to both x- and y-axes Using vector algebra, E × B should
be along x-direction |
1 | 6343-6346 | 1 10
T
3 10 m/s
E
B
c
=
=
=
×
×
To find the direction, we note that E is along y-direction and the
wave propagates along x-axis Therefore, B should be in a direction
perpendicular to both x- and y-axes Using vector algebra, E × B should
be along x-direction Since, (+ ˆj ) × (+ ˆk ) = ˆi , B is along the z-direction |
1 | 6344-6347 | Therefore, B should be in a direction
perpendicular to both x- and y-axes Using vector algebra, E × B should
be along x-direction Since, (+ ˆj ) × (+ ˆk ) = ˆi , B is along the z-direction Thus,
B = 2 |
1 | 6345-6348 | Using vector algebra, E × B should
be along x-direction Since, (+ ˆj ) × (+ ˆk ) = ˆi , B is along the z-direction Thus,
B = 2 1 × 10–8 ˆk T
Example 8 |
1 | 6346-6349 | Since, (+ ˆj ) × (+ ˆk ) = ˆi , B is along the z-direction Thus,
B = 2 1 × 10–8 ˆk T
Example 8 2 The magnetic field in a plane electromagnetic wave is
given by By = (2 × 10–7) T sin (0 |
1 | 6347-6350 | Thus,
B = 2 1 × 10–8 ˆk T
Example 8 2 The magnetic field in a plane electromagnetic wave is
given by By = (2 × 10–7) T sin (0 5×103x+1 |
1 | 6348-6351 | 1 × 10–8 ˆk T
Example 8 2 The magnetic field in a plane electromagnetic wave is
given by By = (2 × 10–7) T sin (0 5×103x+1 5×1011t) |
1 | 6349-6352 | 2 The magnetic field in a plane electromagnetic wave is
given by By = (2 × 10–7) T sin (0 5×103x+1 5×1011t) (a) What is the wavelength and frequency of the wave |
1 | 6350-6353 | 5×103x+1 5×1011t) (a) What is the wavelength and frequency of the wave (b) Write an expression for the electric field |
1 | 6351-6354 | 5×1011t) (a) What is the wavelength and frequency of the wave (b) Write an expression for the electric field Solution
(a) Comparing the given equation with
By = B0 sin 2π
xλ
+Tt
We get,
3
2
0 |
1 | 6352-6355 | (a) What is the wavelength and frequency of the wave (b) Write an expression for the electric field Solution
(a) Comparing the given equation with
By = B0 sin 2π
xλ
+Tt
We get,
3
2
0 5
π10
λ =
×
m = 1 |
1 | 6353-6356 | (b) Write an expression for the electric field Solution
(a) Comparing the given equation with
By = B0 sin 2π
xλ
+Tt
We get,
3
2
0 5
π10
λ =
×
m = 1 26 cm,
and
(
11)
1
1 |
1 | 6354-6357 | Solution
(a) Comparing the given equation with
By = B0 sin 2π
xλ
+Tt
We get,
3
2
0 5
π10
λ =
×
m = 1 26 cm,
and
(
11)
1
1 5
10
/2
23 |
1 | 6355-6358 | 5
π10
λ =
×
m = 1 26 cm,
and
(
11)
1
1 5
10
/2
23 9 GHz
T
=ν
=
×
π =
(b) E0 = B0c = 2×10–7 T × 3 × 108 m/s = 6 × 101 V/m
The electric field component is perpendicular to the direction of
propagation and the direction of magnetic field |
1 | 6356-6359 | 26 cm,
and
(
11)
1
1 5
10
/2
23 9 GHz
T
=ν
=
×
π =
(b) E0 = B0c = 2×10–7 T × 3 × 108 m/s = 6 × 101 V/m
The electric field component is perpendicular to the direction of
propagation and the direction of magnetic field Therefore, the
electric field component along the z-axis is obtained as
Ez = 60 sin (0 |
1 | 6357-6360 | 5
10
/2
23 9 GHz
T
=ν
=
×
π =
(b) E0 = B0c = 2×10–7 T × 3 × 108 m/s = 6 × 101 V/m
The electric field component is perpendicular to the direction of
propagation and the direction of magnetic field Therefore, the
electric field component along the z-axis is obtained as
Ez = 60 sin (0 5 × 103x + 1 |
1 | 6358-6361 | 9 GHz
T
=ν
=
×
π =
(b) E0 = B0c = 2×10–7 T × 3 × 108 m/s = 6 × 101 V/m
The electric field component is perpendicular to the direction of
propagation and the direction of magnetic field Therefore, the
electric field component along the z-axis is obtained as
Ez = 60 sin (0 5 × 103x + 1 5 × 1011 t) V/m
8 |
1 | 6359-6362 | Therefore, the
electric field component along the z-axis is obtained as
Ez = 60 sin (0 5 × 103x + 1 5 × 1011 t) V/m
8 4 ELECTROMAGNETIC SPECTRUM
At the time Maxwell predicted the existence of electromagnetic waves, the
only familiar electromagnetic waves were the visible light waves |
1 | 6360-6363 | 5 × 103x + 1 5 × 1011 t) V/m
8 4 ELECTROMAGNETIC SPECTRUM
At the time Maxwell predicted the existence of electromagnetic waves, the
only familiar electromagnetic waves were the visible light waves The existence
of ultraviolet and infrared waves was barely established |
1 | 6361-6364 | 5 × 1011 t) V/m
8 4 ELECTROMAGNETIC SPECTRUM
At the time Maxwell predicted the existence of electromagnetic waves, the
only familiar electromagnetic waves were the visible light waves The existence
of ultraviolet and infrared waves was barely established By the end of the
nineteenth century, X-rays and gamma rays had also been discovered |
1 | 6362-6365 | 4 ELECTROMAGNETIC SPECTRUM
At the time Maxwell predicted the existence of electromagnetic waves, the
only familiar electromagnetic waves were the visible light waves The existence
of ultraviolet and infrared waves was barely established By the end of the
nineteenth century, X-rays and gamma rays had also been discovered We
now know that, electromagnetic waves include visible light waves, X-rays,
gamma rays, radio waves, microwaves, ultraviolet and infrared waves |
1 | 6363-6366 | The existence
of ultraviolet and infrared waves was barely established By the end of the
nineteenth century, X-rays and gamma rays had also been discovered We
now know that, electromagnetic waves include visible light waves, X-rays,
gamma rays, radio waves, microwaves, ultraviolet and infrared waves The
classification of em waves according to frequency is the electromagnetic
spectrum (Fig |
1 | 6364-6367 | By the end of the
nineteenth century, X-rays and gamma rays had also been discovered We
now know that, electromagnetic waves include visible light waves, X-rays,
gamma rays, radio waves, microwaves, ultraviolet and infrared waves The
classification of em waves according to frequency is the electromagnetic
spectrum (Fig 8 |
1 | 6365-6368 | We
now know that, electromagnetic waves include visible light waves, X-rays,
gamma rays, radio waves, microwaves, ultraviolet and infrared waves The
classification of em waves according to frequency is the electromagnetic
spectrum (Fig 8 5) |
1 | 6366-6369 | The
classification of em waves according to frequency is the electromagnetic
spectrum (Fig 8 5) There is no sharp division between one kind of wave
and the next |
1 | 6367-6370 | 8 5) There is no sharp division between one kind of wave
and the next The classification is based roughly on how the waves are
produced and/or detected |
1 | 6368-6371 | 5) There is no sharp division between one kind of wave
and the next The classification is based roughly on how the waves are
produced and/or detected We briefly describe these different types of electromagnetic waves, in
order of decreasing wavelengths |
1 | 6369-6372 | There is no sharp division between one kind of wave
and the next The classification is based roughly on how the waves are
produced and/or detected We briefly describe these different types of electromagnetic waves, in
order of decreasing wavelengths Electromagnetic spectrum
http://www |
1 | 6370-6373 | The classification is based roughly on how the waves are
produced and/or detected We briefly describe these different types of electromagnetic waves, in
order of decreasing wavelengths Electromagnetic spectrum
http://www fnal |
1 | 6371-6374 | We briefly describe these different types of electromagnetic waves, in
order of decreasing wavelengths Electromagnetic spectrum
http://www fnal gov/pub/inquiring/more/light
http://imagine |
1 | 6372-6375 | Electromagnetic spectrum
http://www fnal gov/pub/inquiring/more/light
http://imagine gsfc |
1 | 6373-6376 | fnal gov/pub/inquiring/more/light
http://imagine gsfc nasa |
1 | 6374-6377 | gov/pub/inquiring/more/light
http://imagine gsfc nasa gov/docs/science/
Rationalised 2023-24
209
Electromagnetic
Waves
FIGURE 8 |
1 | 6375-6378 | gsfc nasa gov/docs/science/
Rationalised 2023-24
209
Electromagnetic
Waves
FIGURE 8 5 The electromagnetic spectrum, with common names for various
part of it |
1 | 6376-6379 | nasa gov/docs/science/
Rationalised 2023-24
209
Electromagnetic
Waves
FIGURE 8 5 The electromagnetic spectrum, with common names for various
part of it The various regions do not have sharply defined boundaries |
1 | 6377-6380 | gov/docs/science/
Rationalised 2023-24
209
Electromagnetic
Waves
FIGURE 8 5 The electromagnetic spectrum, with common names for various
part of it The various regions do not have sharply defined boundaries 8 |
1 | 6378-6381 | 5 The electromagnetic spectrum, with common names for various
part of it The various regions do not have sharply defined boundaries 8 4 |
1 | 6379-6382 | The various regions do not have sharply defined boundaries 8 4 1 Radio waves
Radio waves are produced by the accelerated motion of charges in conducting
wires |
1 | 6380-6383 | 8 4 1 Radio waves
Radio waves are produced by the accelerated motion of charges in conducting
wires They are used in radio and television communication systems |
1 | 6381-6384 | 4 1 Radio waves
Radio waves are produced by the accelerated motion of charges in conducting
wires They are used in radio and television communication systems They
are generally in the frequency range from 500 kHz to about 1000 MHz |
1 | 6382-6385 | 1 Radio waves
Radio waves are produced by the accelerated motion of charges in conducting
wires They are used in radio and television communication systems They
are generally in the frequency range from 500 kHz to about 1000 MHz The AM (amplitude modulated) band is from 530 kHz to 1710 kHz |
1 | 6383-6386 | They are used in radio and television communication systems They
are generally in the frequency range from 500 kHz to about 1000 MHz The AM (amplitude modulated) band is from 530 kHz to 1710 kHz Higher
frequencies upto 54 MHz are used for short wave bands |
1 | 6384-6387 | They
are generally in the frequency range from 500 kHz to about 1000 MHz The AM (amplitude modulated) band is from 530 kHz to 1710 kHz Higher
frequencies upto 54 MHz are used for short wave bands TV waves range
from 54 MHz to 890 MHz |
1 | 6385-6388 | The AM (amplitude modulated) band is from 530 kHz to 1710 kHz Higher
frequencies upto 54 MHz are used for short wave bands TV waves range
from 54 MHz to 890 MHz The FM (frequency modulated) radio band
extends from 88 MHz to 108 MHz |
1 | 6386-6389 | Higher
frequencies upto 54 MHz are used for short wave bands TV waves range
from 54 MHz to 890 MHz The FM (frequency modulated) radio band
extends from 88 MHz to 108 MHz Cellular phones use radio waves to
transmit voice communication in the ultrahigh frequency (UHF) band |
1 | 6387-6390 | TV waves range
from 54 MHz to 890 MHz The FM (frequency modulated) radio band
extends from 88 MHz to 108 MHz Cellular phones use radio waves to
transmit voice communication in the ultrahigh frequency (UHF) band How
these waves are transmitted and received is described in Chapter 15 |
1 | 6388-6391 | The FM (frequency modulated) radio band
extends from 88 MHz to 108 MHz Cellular phones use radio waves to
transmit voice communication in the ultrahigh frequency (UHF) band How
these waves are transmitted and received is described in Chapter 15 8 |
1 | 6389-6392 | Cellular phones use radio waves to
transmit voice communication in the ultrahigh frequency (UHF) band How
these waves are transmitted and received is described in Chapter 15 8 4 |
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