Question 1

Refraction causes the bottom of a swimming pool to appear

Accepted Answer

A)  deeper.
B)  more shallow.
C)  neither B

Question 2

Different colors of light correspond to different light

Accepted Answer

A)  velocities.
B)  intensities.
C)  polarities.
D)  frequencies.
E)  none of the above

Question 3

Humans see best in the yellow-green region of the spectrum.So the efficiency of sodium yellow-green lamps that illuminate highways is

Accepted Answer

A)  higher.
B)  lower.
C)  not affected.

Question 4

According to the law of reflection,the incident ray,reflected ray,and normal between them

Accepted Answer

A)  lie in the same plane.
B)  may or may not lie in the same plane.
C)  lie in planes that are perpendicular to one another.

Question 5

Rainbows are not usually seen as complete circles because

Accepted Answer

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

Question 6

If sunlight were green instead of white,the most comfortable color to wear on a hot day would be

Accepted Answer

A)  magenta.
B)  yellow.
C)  green.
D)  blue.
E)  violet.

Question 7

What accounts for the additional few minutes of sunlight we experience daily,before sunrise and after sunset?

Accepted Answer

Atmospheric refraction adds to daylight ...

Question 8

Non-reflected ultraviolet light that shines on a pane of transparent glass

Accepted Answer

A)  produces a chain of absorptions and re-emissions through the glass.
B)  transforms to thermal energy.
C)  is mostly reflected.

Question 9

The amount of light from an incandescent lamp that is transmitted through an ideal Polaroid filter is half,and through a real Polaroid filter is

Accepted Answer

A)  less than half.
B)  more than half.
C)  half.

Question 10

The solar radiation curve is a graph of

Accepted Answer

A)  colors of sunlight versus their frequencies.
B)  colors of sunlight versus their wavelengths.
C)  the path of the Sun about Earth.
D)  brightness versus frequency.
E)  intensity versus distance from the Sun.

Question 11

A sheet of red paper will look black when illuminated with

Accepted Answer

A)  red light.
B)  yellow light.
C)  magenta light.
D)  cyan light.
E)  none of the above

Question 12

A pane of red glass transmits primarily

Accepted Answer

A)  red light.
B)  the complementary color of red light.
C)  all colors of light.

Question 13

An important feature of red sunsets is the

Accepted Answer

A)  scattering of lower frequencies by larger particles in the air.
B)  longer path of air through which sunlight travels.
C)  lower frequencies of light emitted late in the day by the Sun.
D)  absorption effects of the smaller particles in the air. B

Question 14

A golf ball illuminate by only red light casts a colorless shadow.If instead it is also illuminated by a close-by green light source,the non-overlapping shadows will be

Accepted Answer

A)  green and red.
B)  cyan and magenta.
C)  white.
D)  none of the above

Question 15

The twinkling of stars is a result of atmospheric

Accepted Answer

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

Question 16

Relative to radio waves,the velocity of visible light waves in a vacuum is

Accepted Answer

A)  less.
B)  more.
C)  the same.

Question 17

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

Accepted Answer

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

Question 18

The distance between Earth and the Moon is 3.84 108 m.A pulse of laser light aimed at the Moon that bounces back to Earth undergoes a round-trip time of about

Accepted Answer

A)  zero seconds.
B)  less than 1 second.
C)  two and a half seconds.
D)  three seconds. C

Question 19

Materials generally become warmer when light is

Accepted Answer

A)  absorbed by them.
B)  reflected by them.
C)  transmitted by them.
D)  all of the above
E)  none of the above

Question 20

The three colors that comprise the image on a TV screen are

Accepted Answer

A)  red,blue,and yellow.
B)  red,blue,and green.
C)  yellow,blue,and green.
D)  magenta,cyan,and yellow.
E)  red,green,and yellow.

Exam 11: Light

Refraction causes the bottom of a swimming pool to appear

Correct AnswerverifiedB

Different colors of light correspond to different light

Correct AnswerverifiedShow Answer

Humans see best in the yellow-green region of the spectrum.So the efficiency of sodium yellow-green lamps that illuminate highways is

Correct AnswerverifiedShow Answer

According to the law of reflection,the incident ray,reflected ray,and normal between them

Correct AnswerverifiedShow Answer

Rainbows are not usually seen as complete circles because

Correct AnswerverifiedShow Answer

If sunlight were green instead of white,the most comfortable color to wear on a hot day would be

Correct AnswerverifiedShow Answer

What accounts for the additional few minutes of sunlight we experience daily,before sunrise and after sunset?

Correct AnswerverifiedAtmospheric refraction adds to daylight ...View AnswerShow Answer

Non-reflected ultraviolet light that shines on a pane of transparent glass

Correct AnswerverifiedShow Answer

The amount of light from an incandescent lamp that is transmitted through an ideal Polaroid filter is half,and through a real Polaroid filter is

Correct AnswerverifiedShow Answer

The solar radiation curve is a graph of

Correct AnswerverifiedShow Answer

A sheet of red paper will look black when illuminated with

Correct AnswerverifiedShow Answer

A pane of red glass transmits primarily

Correct AnswerverifiedShow Answer

An important feature of red sunsets is the

Correct AnswerverifiedB

A golf ball illuminate by only red light casts a colorless shadow.If instead it is also illuminated by a close-by green light source,the non-overlapping shadows will be

Correct AnswerverifiedShow Answer

The twinkling of stars is a result of atmospheric

Correct AnswerverifiedShow Answer

Relative to radio waves,the velocity of visible light waves in a vacuum is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The distance between Earth and the Moon is 3.84 108 m.A pulse of laser light aimed at the Moon that bounces back to Earth undergoes a round-trip time of about

Correct AnswerverifiedC

Materials generally become warmer when light is

Correct AnswerverifiedShow Answer

The three colors that comprise the image on a TV screen are

Correct AnswerverifiedShow Answer

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B

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Atmospheric refraction adds to daylight ...
View Answer

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B

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The distance between Earth and the Moon is 3.84 10⁸ m.A pulse of laser light aimed at the Moon that bounces back to Earth undergoes a round-trip time of about

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C

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