Question 1

A prism has a vertex angle of 60° and an index of refraction of 1.52. What is the minimum angle of incidence, measured away from the vertex, for a ray of light to emerge from the other side of the prism?

Accepted Answer

A)  25.6°
B)  38.7°
C)  29.4°
D)  32.1°
E)  33.3°F) A) and B)
G) A) and C)

Question 2

The condition for total internal reflection can be predicted from Snell's law since

Accepted Answer

A)  the index of refraction of glass is about 1.5.
B)  the index of refraction of plastic is about 1.5.
C)  the value of tangent can be 1.0.
D)  the maximum value of the sine is 1.0.
E)  the maximum value of the sine is 1.5.F) C) and D)
G) B) and C)

Question 3

A spherical mirror has a radius of curvature of 22 cm. If the mirror is convex, its focal length is

Accepted Answer

A)  -11 cm.
B)  -44 cm.
C)  22 cm.
D)  11 cm.
E)  -22 cm.F) A) and C)
G) D) and E)

Question 4

Which color of light undergoes the smallest refraction when passing from air to glass?

Accepted Answer

A)  red
B)  yellow
C)  green
D)  violet
E)  blue.F) D) and E)
G) C) and E)

Question 5

A concave mirror with a radius of 20 cm creates a real image 30 cm from the mirror. What is the object distance?

Accepted Answer

A)  50 cm
B)  20 cm
C)  15 cm
D)  7.5 cm
E)  5.0 cmF) C) and D)
G) A) and D)

Question 6

A beam of light that is parallel to the principal axis is incident on a convex mirror. What happens to the reflected beam of light?

Accepted Answer

A)  It also is parallel to the principal axis.
B)  It is perpendicular to the principal axis.
C)  It appears to be coming from the focal point on the other side of the mirror.
D)  It appears to be coming from the center of curvature of the mirror.
E)  It appears to be coming from a point between the focal point and the center of curvature of the mirror.F) All of the above
G) A) and D)

Question 7

A person walks toward a plane mirror at 2.0 ft/s. She is approaching her image in the mirror at a speed of

Accepted Answer

A)  1.0 ft/s.
B)  3.0 ft/s.
C)  2.0 ft/s.
D)  4.0 ft/s.
E)  5.0 ft/s.F) A) and E)
G) None of the above

Question 8

Light enters an equilateral triangle prism in a direction parallel to one side. The prism is made of glass with an index of refraction of 1.52. What is the angle between the incoming ray and the ray that leaves the prism on the other side?

Accepted Answer

A)  83°
B)  19°
C)  59°
D)  27°
E)  55°F) A) and B)
G) A) and C)

Question 9

An object is placed 12 cm in front of a curved mirror. The magnification of the image is -3.0. What is the focal length of the mirror?

Accepted Answer

A)  12 cm
B)  9.0 cm
C)  24 cm
D)  36 cm
E)  16 cmF) B) and D)
G) B) and C)

Question 10

The critical angle for a particular type of glass is 39.0°. What is the index of refraction of the glass?

Accepted Answer

A)  1.52
B)  1.55
C)  1.57
D)  1.59
E)  1.50F) A) and B)
G) A) and E)

Question 11

A object is 12 cm in front of a concave mirror, and the image is 3.0 cm in front of the mirror. What is the focal length of the mirror?

Accepted Answer

A)  0.25 cm
B)  15 cm
C)  4.0 cm
D)  2.4 cm
E)  1.3 cmF) A) and C)
G) B) and C)

Question 12

A light ray, traveling obliquely to a concave mirror's axis, crosses the axis at the mirror's center of curvature before striking the mirror's surface. After reflection, this ray

Accepted Answer

A)  travels parallel to the mirror's axis.
B)  travels at right angles to the mirror's axis.
C)  passes through the mirror's center of curvature.
D)  passes through the mirror's focal point.
E)  passes through the axis midway between the mirror's focal point and center of curvature.F) B) and C)
G) A) and D)

Question 13

If the image distance is negative, the image formed by a mirror is a(n)

Accepted Answer

A)  real image.
B)  virtual image.
C)  imaginary image.
D)  positive image.
E)  negative image.F) B) and D)
G) C) and D)

Question 14

A beam of light that is parallel to the principal axis is incident on a concave mirror. What happens to the reflected beam of light?

Accepted Answer

A)  It also is parallel to the principal axis.
B)  It is perpendicular to the principal axis.
C)  It passes through the center of curvature of the mirror.
D)  It passes through the focal point of the mirror.
E)  It passes between the focal point and the center of curvature of the mirror.F) C) and D)
G) All of the above

Question 15

The critical angle for a beam of light passing from water into air is 48.8°. This means that all light rays with an angle of incidence greater than this angle will be

Accepted Answer

A)  absorbed.
B)  totally reflected.
C)  partially reflected and partially transmitted.
D)  totally transmitted.
E)  totally polarized.F) A) and C)
G) D) and E)

Question 16

A light ray in water passes into air. The angle of incidence in the water is 40°. What is the angle of refraction in air if the index of refraction of water is 1.33?

Accepted Answer

A)  59°
B)  0.59°
C)  40°
D)  1.33°
E)  29°F) B) and C)
G) B) and E)

Question 17

A mirror is rotated at an angle of 10° from its original position. How much is the rotation of the angle of reflection?

Accepted Answer

A)  10°
B)  5°
C)  15°
D)  20°
E)  40°F) C) and D)
G) A) and B)

Question 18

An object is placed in front of a convex mirror at a distance closer than the focal length of the mirror. The image will appear

Accepted Answer

A)  behind the mirror.
B)  upright and reduced.
C)  upright and enlarged.
D)  inverted and reduced.
E)  inverted and enlarged.F) B) and E)
G) A) and E)

Question 19

A pool is filled to a depth of 2.0 m. How deep does the pool appear to be from above the water?

Accepted Answer

A)  1.5 m
B)  1.33 m
C)  -2.0 m
D)  3.0 m
E)  -1.5 mF) B) and D)
G) C) and D)

Question 20

The critical angle for glass in air if the glass has index of refraction 1.50 is

Accepted Answer

A)  41.8°.
B)  85.9°.
C)  56.3°.
D)  90°.
E)  48.1°.F) A) and B)
G) A) and C)

Exam 32: Light: Reflection and Refraction

A pool is filled to a depth of 2.0 m. How deep does the pool appear to be from above the water?

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The critical angle for glass in air if the glass has index of refraction 1.50 is

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A prism has a vertex angle of 60° and an index of refraction of 1.52. What is the minimum angle of incidence, measured away from the vertex, for a ray of light to emerge from the other side of the prism?

Correct AnswerverifiedShow Answer

An object is placed 12 cm in front of a curved mirror. The magnification of the image is -3.0. What is the focal length of the mirror?

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A light ray, traveling obliquely to a concave mirror's axis, crosses the axis at the mirror's center of curvature before striking the mirror's surface. After reflection, this ray

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An object is placed in front of a convex mirror at a distance closer than the focal length of the mirror. The image will appear

Correct AnswerverifiedShow Answer

Which color of light undergoes the smallest refraction when passing from air to glass?

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If the image distance is negative, the image formed by a mirror is a(n)

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A beam of light that is parallel to the principal axis is incident on a concave mirror. What happens to the reflected beam of light?

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The critical angle for a particular type of glass is 39.0°. What is the index of refraction of the glass?

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A mirror is rotated at an angle of 10° from its original position. How much is the rotation of the angle of reflection?

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A light ray in water passes into air. The angle of incidence in the water is 40°. What is the angle of refraction in air if the index of refraction of water is 1.33?

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A spherical mirror has a radius of curvature of 22 cm. If the mirror is convex, its focal length is

Correct AnswerverifiedShow Answer

A object is 12 cm in front of a concave mirror, and the image is 3.0 cm in front of the mirror. What is the focal length of the mirror?

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A person walks toward a plane mirror at 2.0 ft/s. She is approaching her image in the mirror at a speed of

Correct AnswerverifiedShow Answer

A concave mirror with a radius of 20 cm creates a real image 30 cm from the mirror. What is the object distance?

Correct AnswerverifiedShow Answer

A beam of light that is parallel to the principal axis is incident on a convex mirror. What happens to the reflected beam of light?

Correct AnswerverifiedShow Answer

The condition for total internal reflection can be predicted from Snell's law since

Correct AnswerverifiedShow Answer

The critical angle for a beam of light passing from water into air is 48.8°. This means that all light rays with an angle of incidence greater than this angle will be

Correct AnswerverifiedShow Answer

Light enters an equilateral triangle prism in a direction parallel to one side. The prism is made of glass with an index of refraction of 1.52. What is the angle between the incoming ray and the ray that leaves the prism on the other side?

Correct AnswerverifiedShow Answer

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