Question 1

Which of these electromagnetic waves have the shortest wavelength?

Accepted Answer

A) radio waves 
B) infrared waves 
C) X-rays 
D) ultraviolet waves 
E) light waves 
A) radio waves 
B) infrared waves 
C) X-rays 
D) ultraviolet waves 
E) light waves

Question 2

Kids in elementary school get this right: Which color of light gets through red glass?

Accepted Answer

A) red 
B) cyan 
C) none of these 
A) red 
B) cyan 
C) none of these

Question 3

While Earth is experiencing a total solar eclipse, an observer on the side of the Moon facing Earth would see

Accepted Answer

A) Earth disappear from the sky. 
B) Earth dim and turn reddish. 
C) nothing unusual. 
D) a dark area moving across the face of Earth. 
A) Earth disappear from the sky. 
B) Earth dim and turn reddish. 
C) nothing unusual. 
D) a dark area moving across the face of Earth.

Question 4

The Moon would be at its fullest just before the time of a

Accepted Answer

A) solar eclipse. 
B) lunar eclipse. 
C) both of these 
D) neither of these 
A) solar eclipse. 
B) lunar eclipse. 
C) both of these 
D) neither of these

Question 5

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

Question 6

Glass is transparent to

Accepted Answer

A) infrared light. 
B) visible light. 
C) ultraviolet light. 
D) all of the above 
A) infrared light. 
B) visible light. 
C) ultraviolet light. 
D) all of the above

Question 7

Sunburns are produced by

Accepted Answer

A) infrared light. 
B) visible light. 
C) ultraviolet light. 
D) all of the above 
E) none of the above 
A) infrared light. 
B) visible light. 
C) ultraviolet light. 
D) all of the above 
E) none of the above

Question 8

The fact that you can see stars in the nighttime sky is evidence that

Accepted Answer

A) our atmosphere is transparent to visible light. 
B) light can travel in a vacuum. 
C) both of these 
D) neither of these 
A) our atmosphere is transparent to visible light. 
B) light can travel in a vacuum. 
C) both of these 
D) neither of these

Question 9

The fact that light travels only at 300,000 km/s in free space is a consequence of

Accepted Answer

A) electromagnetic wave propagation. 
B) electromagnetic field induction. 
C) Maxwell's laws. 
D) energy conservation. 
E) none of the above 
A) electromagnetic wave propagation. 
B) electromagnetic field induction. 
C) Maxwell's laws. 
D) energy conservation. 
E) none of the above

Question 10

If a light signal and a radio signal were emitted simultaneously from Alpha Centauri, the first to reach Earth would be the

Accepted Answer

A) radio signal. 
B) light signal. 
C) both the same time 
A) radio signal. 
B) light signal. 
C) both the same time

Question 11

Which travels with the greatest speed in a vacuum?

Accepted Answer

A) radio waves 
B) light waves 
C) X-rays 
D) gamma rays 
E) all have the same speed 
A) radio waves 
B) light waves 
C) X-rays 
D) gamma rays 
E) all have the same speed

Question 12

The source of all electromagnetic waves is

Accepted Answer

A) changes in atomic energy levels. 
B) vibrating atoms and molecules. 
C) accelerating electric charges. 
D) crystalline fluctuations. 
E) none of the above 
A) changes in atomic energy levels. 
B) vibrating atoms and molecules. 
C) accelerating electric charges. 
D) crystalline fluctuations. 
E) none of the above

Question 13

A lunar eclipse occurs when the

Accepted Answer

A) Sun passes into Earth's shadow. 
B) Moon passes into Earth's shadow. 
C) Earth passes into the Sun's shadow. 
D) Earth passes into the Moon's shadow. 
A) Sun passes into Earth's shadow. 
B) Moon passes into Earth's shadow. 
C) Earth passes into the Sun's shadow. 
D) Earth passes into the Moon's shadow.

Question 14

The natural frequency of the atoms in glass is in the

Accepted Answer

A) infrared part of the spectrum. 
B) visible part of the spectrum. 
C) ultraviolet part of the spectrum. 
A) infrared part of the spectrum. 
B) visible part of the spectrum. 
C) ultraviolet part of the spectrum.

Question 15

The crescent shapes of spots of light cast through openings in trees occurs with a

Accepted Answer

A) partial eclipse of the Sun. 
B) total eclipse of the Sun. 
C) lunar eclipse, partial or total. 
D) partial lunar eclipse. 
A) partial eclipse of the Sun. 
B) total eclipse of the Sun. 
C) lunar eclipse, partial or total. 
D) partial lunar eclipse.

Question 16

Compared to the photon that enters a pane of window glass, the photon that emerges is

Accepted Answer

A) the same photon. 
B) an identical but different photon. 
C) an altogether different photon. 
D) none of the above 
A) the same photon. 
B) an identical but different photon. 
C) an altogether different photon. 
D) none of the above

Question 17

What is the frequency of an electromagnetic wave that has a wavelength of 300,000 km?

Accepted Answer

A) less than 1 Hz 
B) 1 Hz 
C) more than 1 Hz 
A) less than 1 Hz 
B) 1 Hz 
C) more than 1 Hz

Question 18

A total shadow is called

Accepted Answer

A) an umbra, and a partial shadow a penumbra. 
B) a penumbra, and a partial shadow an umbra. 
C) neither of these 
A) an umbra, and a partial shadow a penumbra. 
B) a penumbra, and a partial shadow an umbra. 
C) neither of these

Question 19

Earth's atmosphere is opaque to waves that are concentrated in the

Accepted Answer

A) infrared part of the spectrum. 
B) visible part of the spectrum. 
C) entire electromagnetic spectrum. 
A) infrared part of the spectrum. 
B) visible part of the spectrum. 
C) entire electromagnetic spectrum.

Question 20

The size of the pupil of your eye depends on

Accepted Answer

A) the brightness of light in the room. 
B) your mood. 
C) both of these 
D) neither of these 
A) the brightness of light in the room. 
B) your mood. 
C) both of these 
D) neither of these

Exam 26: Properties of Light

Which of these electromagnetic waves have the shortest wavelength?

Kids in elementary school get this right: Which color of light gets through red glass?

While Earth is experiencing a total solar eclipse, an observer on the side of the Moon facing Earth would see

The Moon would be at its fullest just before the time of a

Materials generally become warmer when light is

Glass is transparent to

Sunburns are produced by

The fact that you can see stars in the nighttime sky is evidence that

The fact that light travels only at 300,000 km/s in free space is a consequence of

If a light signal and a radio signal were emitted simultaneously from Alpha Centauri, the first to reach Earth would be the

Which travels with the greatest speed in a vacuum?

The source of all electromagnetic waves is

A lunar eclipse occurs when the

The natural frequency of the atoms in glass is in the

The crescent shapes of spots of light cast through openings in trees occurs with a

Compared to the photon that enters a pane of window glass, the photon that emerges is

What is the frequency of an electromagnetic wave that has a wavelength of 300,000 km?

A total shadow is called

Earth's atmosphere is opaque to waves that are concentrated in the

The size of the pupil of your eye depends on

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