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A ray of light in air is incident on an air-to-glass boundary at an angle of 30

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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 ... – PowerPoint PPT presentation

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Title: A ray of light in air is incident on an air-to-glass boundary at an angle of 30


1
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?
  1. 56
  2. 46
  3. 30
  4. 18

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2
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?
  1. 56
  2. 46
  3. 30
  4. 18

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21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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3
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)
  1. 4.38 x 108 m/s
  2. 2.05 x 108 m/s
  3. -4.461 x 108 m/s
  4. -1.461 x 108 m/s

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4
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).
  1. 1.35
  2. 1.48
  3. 1.49
  4. 0.743

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21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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5
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).
  1. 3.14 x 10-19 J
  2. 5.4 x 10-19 J
  3. 7.6 x 10-19 J
  4. 1.15 x 10-18 J

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6
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?
  1. 0.22
  2. 0.45
  3. 1.90
  4. 1.81

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21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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7
A light beam is incident upon a still water
surface. What is the maximum possible value for
the angle of refraction? (nwater 1.333).
  1. 76.2
  2. 67.5
  3. 54.4
  4. 48.6

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21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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8
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?
  1. 79.5
  2. 90.0
  3. 130.5
  4. 140

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21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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9
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"?
  1. T lt 66.6
  2. T lt 57.1
  3. T lt 51.7
  4. T lt 48.2

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10
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)
  1. 9.9
  2. 13.8
  3. 19.5
  4. 27.0

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11
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).
  1. 0.57 m
  2. 0.77 m
  3. 1.13 m
  4. 1.43 m

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12
If total internal reflection occurs at a
glass-air surface,
  1. no light is refracted.
  2. no light is reflected.
  3. light is leaving the air and hitting the glass
    with an incident angle greater than the critical
    angle.
  4. light is leaving the air and hitting the glass
    with an incident angle less than the critical
    angle.

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13
Dispersion occurs when?
  1. some materials bend light more than other
    materials.
  2. a material slows down some wavelengths more than
    others.
  3. a material changes some frequencies more than
    others.
  4. light has different speeds in different materials.

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14
When one shines red light and green light on the
same place on a piece of white paper, the spot
appears to be?
  1. yellow.
  2. brown.
  3. white.
  4. black.

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15
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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16
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?
  1. 11.9
  2. 20.0
  3. 23.8
  4. 27.6

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17
One phenomenon that demonstrates the wave nature
of light is?
  1. photoelectric effects.
  2. quantization effects.
  3. absorption of light by an electron.
  4. interference effects.

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18
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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19
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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20
When light of one wavelength from air hits a
smooth piece of glass at an angle, which of the
following will not occur?
  1. reflection
  2. refraction
  3. dispersion
  4. All of the choices will occur.

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21
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?
  1. reflection and transmission at q2 0
  2. refraction at q2 41.8
  3. dispersion
  4. all of the choices will occur

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22
According to present theories of light, in some
experiments light seems to be?
  1. composed of particles which can neither be
    created nor destroyed.
  2. a particle whose quantized energy depends on its
    velocity.
  3. a wave which moves from one place to another if
    there is material to vibrate.
  4. none of the choices

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23
The wave-particle duality of light means that, in
the same experiment,
  1. light will act both like a wave and like a
    particle.
  2. light will act either like a wave or like a
    particle.
  3. light will not act like either a wave or a
    particle.
  4. light always exists as two waves or as two
    particles.

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24
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. Earth was moving away from Jupiter.
  2. Earth was approaching Jupiter.
  3. Earth was closest to Jupiter.
  4. Earth was on the other side of the sun from
    Jupiter.

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25
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?
  1. 18.1
  2. 24.2
  3. 26.8
  4. 37.0

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26
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?
  1. 14.2
  2. 22.1
  3. 28.2
  4. 46.0

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27
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?
  1. 14.1
  2. 22.3
  3. 28.4
  4. 46.0

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28
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?
  1. 18.1
  2. 24.2
  3. 27.3
  4. 37.0

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29
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?
  1. 33
  2. 45
  3. 67
  4. 58.5

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30
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)
  1. 0.52 rev/s
  2. 3.1 rev/s
  3. 6.3 rev/s
  4. 12.5 rev/s

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31
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)
  1. 18.6
  2. 37.2
  3. 48.6
  4. Fish will not see fisherman at any angle.

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32
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?
  1. 23
  2. 30
  3. 38
  4. 46

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33
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?
  1. orange
  2. violet
  3. red
  4. green

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21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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34
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?
  1. 30.0
  2. 52.2
  3. 60.3
  4. Critical angle does not exist.

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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
35
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?
  1. 23.2
  2. 32.3
  3. 38.4
  4. 46.0

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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
36
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?
  1. 83.1
  2. 62.4
  3. 41.8
  4. 27.6

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21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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37
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?
  1. 192 nm
  2. 359 nm
  3. 560 nm
  4. 874 nm

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38
What is the angle of incidence on an air-to-glass
boundary if the angle of refraction in the glass
(n 1.52) is 25?
  1. 16
  2. 25
  3. 40
  4. 43

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41 42 43 44 45 46 47 48 49 50
39
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?
  1. 1.26
  2. 1.49
  3. 1.14
  4. 1.33

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40
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)
  1. 1.56 x 108 m/s
  2. 1.92 x 108 m/s
  3. 2.19 x 108 m/s
  4. 4.68 x 108 m/s

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
41
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)
  1. 671 nm
  2. 612.5 nm
  3. 490 nm
  4. 392 nm

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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42
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?
  1. 15
  2. 34
  3. 60
  4. 75

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43
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?
  1. 0.33
  2. 1.0
  3. 1.73
  4. 3.0

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44
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?
  1. Galileo
  2. Roemer
  3. Fizeau
  4. Snell

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45
Which one of the following scientists first
measured the speed of light using a rotating
toothed wheel technique?
  1. Galileo
  2. Roemer
  3. Fizeau
  4. Snell

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46
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)
  1. 1.8
  2. 1.25
  3. 1.33
  4. 0.80

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41 42 43 44 45 46 47 48 49 50
47
Monochromatic light hits a piece of glass. What
happens to the wavelength in the glass as the
index of refraction increases?
  1. decreases
  2. increases
  3. remains constant
  4. approaches 3 x 108 m

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41 42 43 44 45 46 47 48 49 50
48
Which of the following describes what will happen
to a light ray incident on an air-to-glass
boundary?
  1. total reflection
  2. total transmission
  3. partial reflection, partial transmission
  4. partial reflection, total transmission

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41 42 43 44 45 46 47 48 49 50
49
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

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41 42 43 44 45 46 47 48 49 50
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

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41 42 43 44 45 46 47 48 49 50
51
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

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52
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

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53
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?
  1. 3.00 x 108 m/s
  2. 1.93 x 108 m/s
  3. 2.01 x 108 m/s
  4. 1.35 x 108 m/s

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54
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?
  1. zero
  2. 45
  3. 90
  4. 180

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55
Huygen's wave theory requires which of the
following with regard to the relative speeds of
light in glass and in air?
  1. speed in air is greater than in glass
  2. speed in air is less than in glass
  3. speed in air equals that in glass
  4. speed in glass equals square root of that in air

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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56
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?
  1. 42
  2. 23
  3. 35
  4. 59

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57
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
glass-to-liquid boundary makes an angle of 30
with the normal, what is the angle of the
corresponding refracted ray with respect to the
normal?
  1. 55.5
  2. 29.4
  3. 31.4
  4. 19.2

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58
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?
  1. 361 nm
  2. 387.5 nm
  3. 895 nm
  4. 960 nm

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59
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?
  1. 2.13
  2. 1.74
  3. 1.23
  4. 1.41

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60
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?
  1. 89
  2. 69
  3. 21
  4. 4.0

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