A ray of light in air is incident on an air-to-glass boundary at
an angle of 30° with the normal. If the index of refraction of
the glass is 1.65, what is the angle of the refracted ray within
the glass with respect to the normal?
25% 25% 25% 25%
1.
2.
3.
4.
56°
46°
30°
18°
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50
A ray of light in air is incident on an air-to-glass boundary at
an angle of 30° with the normal. If the index of refraction of
the glass is 1.65, what is the angle of the ray reflected off the
glass surface with respect to the normal?
25% 25% 25% 25%
1.
2.
3.
4.
56°
46°
30°
18°
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50
If carbon tetrachloride has an index of refraction
of 1.461, what is the speed of light through this
liquid? (c = 3 x 108 m/s)
25% 25% 25% 25%
1.
2.
3.
4.
4.38 x 108 m/s
2.05 x 108 m/s
-4.461 x 108 m/s
-1.461 x 108 m/s
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50
If the critical angle for internal reflection inside a certain
transparent material is found to be 48°, what is the
index of refraction of the material? (Air is outside the
material).
25% 25% 25% 25%
1.
2.
3.
4.
1.35
1.48
1.49
0.743
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50
Helium-neon laser light has a wavelength in air of
632.8 nm. What is the energy of a single photon in
the beam? (h = 6.626 x 10-34 J-s and c = 3 x 108
m/s).
25% 25% 25% 25%
1.
2.
3.
4.
3.14 x 10-19 J
5.4 x 10-19 J
7.6 x 10-19 J
1.15 x 10-18 J
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50
A certain kind of glass has an index of refraction of 1.65 for
blue light and an index of refraction of 1.61 for red light. If a
beam of white light (containing all colors) is incident at an
angle of 30°, what is the angle between the red and blue light
inside the glass?
25% 25% 25% 25%
1.
2.
3.
4.
0.22°
0.45°
1.90°
1.81°
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49
50
A light beam is incident upon a still water
surface. What is the maximum possible value
for the angle of refraction? (nwater = 1.333).
25% 25% 25% 25%
1.
2.
3.
4.
76.2°
67.5°
54.4°
48.6°
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49
50
A beam of light is incident upon a flat piece of glass (n =
1.50) at an angle of incidence of 30°. Part of the beam
is transmitted and part is reflected. What is the angle
between the reflected and transmitted rays?
25% 25% 25% 25%
1.
2.
3.
4.
79.5°
90.0°
130.5°
140°
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49
50
An optical fiber is made of clear plastic with index of
refraction n = 1.50. For what angles with the
surface will light remain within the plastic "guide"?
25% 25% 25% 25%
1.
2.
3.
4.
Θ < 66.6°
Θ < 57.1°
Θ < 51.7°
Θ < 48.2°
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49
50
An underwater scuba diver sees the sun at an
apparent angle of 45° from the vertical. How far
is the sun above the horizon? (nwater = 1.333)
25% 25% 25% 25%
1.
2.
3.
4.
9.9°
13.8°
19.5°
27.0°
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49
50
A small underwater pool light is 1m below the surface of
a swimming pool. What is the radius of the circle of light
on the surface, from which light emerges from the
water? (nwater = 1.333).
25% 25% 25% 25%
1.
2.
3.
4.
0.57 m
0.77 m
1.13 m
1.43 m
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50
If total internal reflection
occurs at a glass-air surface,
1.
2.
3.
4.
25% 25% 25% 25%
no light is refracted.
no light is reflected.
light is leaving the air and
hitting the glass with an
incident angle greater than the
critical angle.
light is leaving the air and
hitting the glass with an
incident angle less than the
critical angle.
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50
Dispersion occurs when?
1.
2.
3.
4.
some materials bend light more
than other materials.
a material slows down some
wavelengths more than others.
a material changes some
frequencies more than others.
light has different speeds in
different materials.
25% 25% 25% 25%
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49
50
When one shines red light and green light
on the same place on a piece of white
paper, the spot appears to be?
25% 25% 25% 25%
1.
2.
3.
4.
yellow.
brown.
white.
black.
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4
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49
50
When light from air hits a smooth piece of glass
with the ray perpendicular to the glass surface,
the part of the light passing into the glass?
1. will not change its
speed.
2. will not change its
frequency.
3. will not change its
wavelength.
4. will not change its
intensity.
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49
50
Light in air enters a diamond (n = 2.42) at
an angle of incidence of 30°. What is the
angle of refraction inside the diamond?
25% 25% 25% 25%
1.
2.
3.
4.
11.9°
20.0°
23.8°
27.6°
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49
50
One phenomenon that demonstrates
the wave nature of light is?
25% 25% 25% 25%
1. photoelectric effects.
2. quantization effects.
3. absorption of light by
an electron.
4. interference effects.
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49
50
A line representing a wavefront
for a wave should be drawn?
1. from the source to the
receiver.
2. from one crest to the
preceding crest.
3. along one of the
crests of the wave.
4. in the direction the
wave is moving.
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49
50
One phenomenon that demonstrates
the particle nature of light is?
1. the photoelectric
effect.
2. diffraction effects.
3. interference effects.
4. the prediction by
Maxwell's
electromagnetic
theory.
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50
When light of one wavelength from air hits
a smooth piece of glass at an angle,
which of the following will not occur?
25% 25% 25% 25%
1.
2.
3.
4.
reflection
refraction
dispersion
All of the choices
will occur.
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49
50
When light from air hits a smooth piece of glass
(n = 1.5) with the ray perpendicular to the glass
surface, which of the following will occur?
25% 25% 25% 25%
1.
2.
3.
4.
reflection and
transmission at q2 = 0°
refraction at q2 = 41.8°
dispersion
all of the choices will
occur
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50
According to present theories of light, in
some experiments light seems to be?
1.
2.
3.
4.
composed of particles which
can neither be created nor
destroyed.
a particle whose quantized
energy depends on its velocity.
a wave which moves from one
place to another if there is
material to vibrate.
none of the choices
25% 25% 25% 25%
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49
50
The wave-particle duality of light
means that, in the same experiment,
1.
2.
3.
4.
25% 25% 25% 25%
light will act both like a
wave and like a particle.
light will act either like a
wave or like a particle.
light will not act like either
a wave or a particle.
light always exists as two
waves or as two particles.
1
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4
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49
50
When Roemer estimated the speed of light from the
eclipses of a moon of Jupiter, he observed that the time
between eclipses was increasing when?
1.
2.
3.
4.
Earth was moving away
from Jupiter.
Earth was approaching
Jupiter.
Earth was closest to
Jupiter.
Earth was on the other
side of the sun from
Jupiter.
25% 25% 25% 25%
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50
An oil film floats on a water surface. The indices of refraction for
water and oil, respectively, are 1.333 and 1.466. If a ray of light is
incident on the air-to-oil surface at an angle of 37° with the normal,
what is the angle of the refracted ray at the oil-to-water surface?
25% 25% 25% 25%
1.
2.
3.
4.
18.1°
24.2°
26.8°
37.0°
1
2
3
4
1
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3
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5
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7
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49
50
A ray of light is incident on the mid-point of a glass prism surface at
an angle of 25° with the normal. For the glass, n = 1.55, and the
prism apex angle is 30°. What is the angle of incidence at the
glass-to-air surface on the side opposite where the ray entered the
prism?
25% 25% 25% 25%
1.
2.
3.
4.
14.2°
22.1°
28.2°
46.0°
1
2
3
4
1
2
3
4
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48
49
50
A ray of light is incident on the mid-point of a glass prism surface at
an angle of 25° with the normal. For the glass, n = 1.55, and the
prism apex angle is 30°. What is the angle of refraction as the ray
enters the air on the far side of the prism?
25% 25% 25% 25%
1.
2.
3.
4.
14.1°
22.3°
28.4°
46.0°
1
2
3
4
1
2
3
4
5
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46
47
48
49
50
An oil film floats on a water surface. The indices of refraction for
water and oil, respectively, are 1.333 and 1.466. If a ray of light is
incident on the air-to-oil surface at an angle of 37° with the normal,
what is the incident angle at the oil-to-water surface?
25% 25% 25% 25%
1.
2.
3.
4.
18.1°
24.2°
27.3°
37.0°
1
2
3
4
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2
3
4
5
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7
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48
49
50
A light ray passes from air through a thin plastic slab (n = 1.3) with
parallel sides. If the incident ray in air makes an angle of 45° with
the normal, what is the angle of refraction for the final ray as it
emerges from the opposite side of the plastic into the air?
25% 25% 25% 25%
1.
2.
3.
4.
33°
45°
67°
58.5°
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4
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49
50
In an experiment to measure the speed of light using the notched-wheel
apparatus, the distance between wheel and mirror is 24 km and the wheel
has a total of 1000 evenly spaced notches. What minimum rotational
speed must the wheel have to allow the reflected pulse to pass through an
open notch on the opposite side of the wheel from where the pulse
originated? (c = 3.00 x 108 m/s)
25% 25% 25% 25%
1.
2.
3.
4.
0.52 rev/s
3.1 rev/s
6.3 rev/s
12.5 rev/s
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2
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4
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48
49
50
A fish is 1.2 m beneath the surface of a still pond of water. At what
angle must the fish look toward the surface (measured with respect
to the normal to the surface) in order to see a fisherman sitting on a
distant bank? (for water, n = 1.333)
25% 25% 25% 25%
1.
2.
3.
4.
18.6°
37.2°
48.6°
Fish will not see
fisherman at any
angle.
1
2
3
4
1
2
3
4
5
6
7
8
9
10
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12
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32
33
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35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A ray of light is incident on a liquid-to-glass interface at
an angle of 35°. Indices of refraction for the liquid and
glass are, respectively, 1.63 and 1.52. What is the angle
of refraction for the ray moving through the glass?
25% 25% 25% 25%
1.
2.
3.
4.
23°
30°
38°
46°
1
2
3
4
1
2
3
4
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8
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45
46
47
48
49
50
A ray of white light, incident upon a glass prism, is
dispersed into its various color components. Which one
of the following colors experiences the greatest angle of
deviation?
25% 25% 25% 25%
1.
2.
3.
4.
orange
violet
red
green
1
2
3
4
1
2
3
4
5
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7
8
9
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31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A ray of light travels across a liquid-to-glass interface. If
the indices of refraction for the liquid and glass are,
respectively, 1.75 and 1.52, what is the critical angle at
this interface?
25% 25% 25% 25%
1.
2.
3.
4.
30.0°
52.2°
60.3°
Critical angle does
not exist.
1
2
3
4
1
2
3
4
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7
8
9
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11
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30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A ray of light travels from a glass-to-liquid interface at
an angle of 35°. Indices of refraction for the glass and
liquid are, respectively, 1.52 and 1.63. What is the angle
of refraction for the ray moving through the liquid?
25% 25% 25% 25%
1.
2.
3.
4.
23.2°
32.3°
38.4°
46.0°
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
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35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A fiber optic cable (n = 1.50) is submerged in
water (n = 1.33). What is the critical angle for
light to stay inside the cable?
25% 25% 25% 25%
1.
2.
3.
4.
83.1°
62.4°
41.8°
27.6°
1
2
3
4
1
2
3
4
5
6
7
8
9
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32
33
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35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
If light from a 560 nm monochromatic source in air is
incident upon the surface of fused quartz (n = 1.56) at
an angle of 60°, what is the wavelength of the ray
refracted within the quartz?
25% 25% 25% 25%
1.
2.
3.
4.
192 nm
359 nm
560 nm
874 nm
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
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31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
What is the angle of incidence on an airto-glass boundary if the angle of refraction
in the glass (n = 1.52) is 25°?
25% 25% 25% 25%
1.
2.
3.
4.
16°
25°
40°
43°
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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21
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23
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29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A monochromatic light source emits a wavelength of
490 nm in air. When passing through a liquid, the
wavelength reduces to 429 nm. What is the liquid's
index of refraction?
25% 25% 25% 25%
1.
2.
3.
4.
1.26
1.49
1.14
1.33
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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18
19
20
21
22
23
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25
26
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28
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31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Fused quartz has an index of refraction of 1.56 for light
from a 560 nm source. What is the speed of light for this
wavelength within the quartz? (c = 3.00 x 108 m/s)
25% 25% 25% 25%
1.
2.
3.
4.
1.56 x 108 m/s
1.92 x 108 m/s
2.19 x 108 m/s
4.68 x 108 m/s
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
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13
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15
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25
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29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
If the wavelength of a monochromatic source is 490 nm
in vacuum, what is the wavelength from the same
source when it passes through a liquid where the
velocity of light is 2.4 x 108 m/s? (c = 3 x 108 m/s)
25% 25% 25% 25%
1.
2.
3.
4.
671 nm
612.5 nm
490 nm
392 nm
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
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30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Light from a 560 nm monochromatic source is incident
upon the surface of fused quartz (n = 1.56) at an angle
of 60°. What is the angle of reflection from the surface?
25% 25% 25% 25%
1.
2.
3.
4.
15°
34°
60°
75°
1
2
3
4
1
2
3
4
5
6
7
8
9
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11
12
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32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
According to Planck's formula, tripling the frequency of
the radiation from a monochromatic source will change
the energy content of the individually radiated photons
by what factor?
25% 25% 25% 25%
1.
2.
3.
4.
0.33
1.0
1.73
3.0
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Which one of the following scientists made a successful
estimate of the speed of light by taking into account the
interval of time delay for one of Jupiter's moons?
25% 25% 25% 25%
1.
2.
3.
4.
Galileo
Roemer
Fizeau
Snell
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
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19
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22
23
24
25
26
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28
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30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Which one of the following scientists first
measured the speed of light using a
rotating toothed wheel technique?
25% 25% 25% 25%
1.
2.
3.
4.
Galileo
Roemer
Fizeau
Snell
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
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31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
If the velocity of light through an unknown liquid is
measured at 2.4 x 108 m/s, what is the index of
refraction of this liquid? (c = 3 x 108 m/s)
25% 25% 25% 25%
1.
2.
3.
4.
1.8
1.25
1.33
0.80
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
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32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Monochromatic light hits a piece of glass.
What happens to the wavelength in the
glass as the index of refraction increases?
25% 25% 25% 25%
1.
2.
3.
4.
decreases
increases
remains constant
approaches 3 x 108 m
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
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32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Which of the following describes what will
happen to a light ray incident on an air-toglass boundary?
1. total reflection
2. total transmission
3. partial reflection,
partial transmission
4. partial reflection,
total transmission
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
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13
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32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Which of the following describes what will
happen to a light ray incident on an air-to-glass
boundary at less than the critical angle?
1. total reflection
2. total transmission
3. partial reflection,
partial transmission
4. partial reflection,
total transmission
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Which of the following describes what will
happen to a light ray incident on a glass-to-air
boundary at greater than the critical angle?
1. total reflection
2. total transmission
3. partial reflection,
partial transmission
4. partial reflection,
total transmission
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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17
18
19
20
21
22
23
24
25
26
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28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
As a monochromatic light ray is transmitted
through an air-to-glass boundary, what happens
to the wavelength?
1. increases
2. decreases
3. remains
unchanged
4. approaches zero
value
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A light ray in air enters and passes through a
block of glass. What can be stated with regard
to its speed after it emerges from the block?
1. speed is less than
when in glass
2. speed is less than
before it entered glass
3. speed is same as that
in glass
4. speed is same as that
before it entered glass
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A beam of light in air is incident on the surface of a rectangular
block of clear plastic (n = 1.49). If the velocity of the beam before it
enters the plastic is 3 x 108 m/s, what is its velocity after emerging
from the block?
25% 25% 25% 25%
1.
2.
3.
4.
3.00 x 108 m/s
1.93 x 108 m/s
2.01 x 108 m/s
1.35 x 108 m/s
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
As the angle of incidence is increased for a ray incident
on a reflecting surface, the angle between the incident
and reflected rays ultimately approaches what value?
25% 25% 25% 25%
1.
2.
3.
4.
zero
45°
90°
180°
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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20
21
22
23
24
25
26
27
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31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Huygen's wave theory requires which of
the following with regard to the relative
speeds of light in glass and in air?
1.
2.
3.
4.
25% 25% 25% 25%
speed in air is greater
than in glass
speed in air is less than in
glass
speed in air equals that in
glass
speed in glass equals
square root of that in air
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A beam of light in air is incident at an angle of 35° to the surface of
a rectangular block of clear plastic (n = 1.49). The light beam first
passes through the block and re-emerges from the opposite side
into air at what angle to the normal to that surface?
25% 25% 25% 25%
1.
2.
3.
4.
42°
23°
35°
59°
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Carbon tetrachloride (n = 1.46) is poured into a container made of
crown glass (n = 1.52). If the light ray in glass incident on the glassto-liquid boundary makes an angle of 30° with the normal, what is
the angle of the corresponding refracted ray with respect to the
normal?
25% 25% 25% 25%
1.
2.
3.
4.
55.5°
29.4°
31.4°
19.2°
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A monochromatic beam of light in air has a wavelength
of 589 nm in air. It passes through glass (n = 1.52) and
then through carbon disulfide (n = 1.63). What is its
wavelength in the carbon disulfide?
25% 25% 25% 25%
1.
2.
3.
4.
361 nm
387.5 nm
895 nm
960 nm
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A light ray in air is incident on an air to glass boundary
at an angle of 45° and is refracted in the glass of 30°
with the normal. What is the index of refraction of the
glass?
25% 25% 25% 25%
1.
2.
3.
4.
2.13
1.74
1.23
1.41
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Carbon disulfide (n = 1.63) is poured into a container
made of crown glass (n = 1.52). What is the critical
angle for internal reflection of a ray in the liquid when it
is incident on the liquid-to-glass surface?
25% 25% 25% 25%
1.
2.
3.
4.
89°
69°
21°
4.0°
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
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40
41
42
43
44
45
46
47
48
49
50