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The glare seen from water is largely


A) non polarized.
B) horizontally polarized.
C) vertically polarized.

D) All of the above
E) B) and C)

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The twinkling of the stars is a result of atmospheric


A) scattering.
B) aberrations.
C) reflection.
D) dispersion.
E) refraction.

F) B) and C)
G) A) and E)

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The amount of light reflected from the front surface of a common windowpane is about


A) 8 percent.
B) 40 percent.
C) 92 percent.
D) 4 percent.
E) 96 percent.

F) A) and C)
G) All of the above

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If you wish to hit a blue fish with a red laser beam, you should compensate for refraction between the air and water by aiming your laser


A) above the sighted fish.
B) below the sighted fish.
C) directly at the sighted fish.

D) None of the above
E) All of the above

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The image of the "infinitely-far-away" sun produced by a converging lens appears


A) between the lens and the focal point.
B) beyond the focal point.
C) at the focal point.

D) B) and C)
E) A) and C)

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Reflected light from the moon in a lake often appears as a vertical column when the water is


A) slightly rough.
B) perfectly still.
C) very rough - churning with waves.

D) B) and C)
E) All of the above

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Standing at the shore of a still lake, the reflected view of scenery on the far side of the lake is the view you would see if you were upside down with your eye in the line of sight


A) directly beneath you, as far below water level as you are above.
B) at the surface of the water where the light reflects.
C) where it already is.
D) close to the distant shore.
E) none of these

F) A) and D)
G) D) and E)

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If you wish to send a beam of laser light to a space station that is just above the atmosphere near the horizon, you should aim your laser


A) above your line of sight.
B) along your line of sight.
C) below your line of sight.

D) All of the above
E) A) and C)

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If you view exact duplicates of slides in the left and right positions of a stereo projector, you can see


A) depth.
B) no depth.

C) A) and B)
D) undefined

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When white light goes from air into water, the color that refracts the most is


A) orange.
B) green.
C) violet.
D) red.
E) All refract the same amount.

F) A) and B)
G) A) and C)

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Light is emitted when


A) electromagnetic waves emanate from matter.
B) atomic nuclei are made to vibrate.
C) high-frequency sound waves strike matter.
D) electron clouds of atoms are forced into oscillation.

E) All of the above
F) B) and C)

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If you wish to hit a red fish with a red laser beam, you should compensate for refraction between the air and water by aiming your laser


A) above the sighted fish.
B) below the sighted fish.
C) directly at the sighted fish.

D) A) and C)
E) All of the above

Correct Answer

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The sun's elliptical shape at sunset can be adequately explained by


A) Fermat's principle.
B) the law of refraction.
C) both of these
D) none of these

E) B) and C)
F) B) and D)

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Rainbows are not usually seen as complete circles because


A) the ground is usually in the way.
B) rainbows are actually arched shaped.
C) they are actually elliptical.
D) raindrops are not perfectly round.
E) they have no bottom part.

F) A) and B)
G) B) and D)

Correct Answer

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The first ones to use optical fibers were


A) polar bears.
B) physicists.
C) engineers.
D) surgeons.
E) mechanics.

F) A) and B)
G) D) and E)

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