Question 1

The main difference between the retina of a human eye and that of a dog's eye is the

Accepted Answer

A)  predominance of cones in a dog's retina.
B)  absence of cones in a dog's retina.
C)  more intricate optic nerve in a human's eye.
D)  small number of cones in a human's eye.
E)  none of the above

Question 2

Which of these electromagnetic waves have the longest wavelength?

Accepted Answer

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

Question 3

When visible light is incident upon clear glass, atoms in the glass

Accepted Answer

A)  are forced into vibration.
B)  resonate.
C)  convert the light energy into internal energy.

Question 4

Radio waves travel

Accepted Answer

A)  always much faster than sound waves.
B)  in common cases at the same speed as sound waves.
C)  slower, on average, than sound waves.
D)  at a speed that depends on frequency.

Question 5

When an astronaut on the Moon experiences a solar eclipse, observers on Earth see

Accepted Answer

A)  a lunar eclipse.
B)  a solar eclipse.
C)  no eclipse at all.

Question 6

Glass is transparent to wave frequencies that

Accepted Answer

A)  match its natural frequencies.
B)  are below its natural frequencies.
C)  both of these
D)  neither of these

Question 7

Which of the following is fundamentally different from the others?

Accepted Answer

A)  sound waves
B)  X-rays
C)  gamma rays
D)  light waves
E)  radio waves

Question 8

Our eyes are not very good at seeing

Accepted Answer

A)  motion at our peripheries.
B)  differences in brightness.
C)  color in dim light.
D)  all of the above
E)  none of the above

Question 9

If the color spectrum ranges from red to violet, then it ranges from

Accepted Answer

A)  low frequencies to high frequencies.
B)  long wavelengths to short wavelengths.
C)  both of these
D)  neither of these

Question 10

A new Moon appears in the sky just before the time of a

Accepted Answer

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

Question 11

Your friend says that any radio wave travels appreciably faster than any sound wave.

Accepted Answer

A)  agree with your friend unconditionally
B)  agree with your friend for most common cases
C)  disagree with your friend
D)  find a new friend

Question 12

In free space, electromagnetic waves travel at a

Accepted Answer

A)  variety of speeds.
B)  single speed.
C)  speed depending on frequency.

Question 13

Compared to its average speed in air, the average speed of a beam of light in glass is

Accepted Answer

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

Question 14

The sensation of color is seen when light falls on the eye's

Accepted Answer

A)  rods.
B)  cones.
C)  both of these
D)  neither of these

Question 15

If the Sun were to disappear at this moment, we wouldn't know about it for

Accepted Answer

A)  7 seconds, reflex time.
B)  8 seconds.
C)  8 minutes.
D)  8 hours.

Question 16

A solar eclipse occurs when the

Accepted Answer

A)  Sun passes into Earth's shadow.
B)  Moon passes into Earth's shadow.
C)  the Moon's shadow is cast on Earth.
D)  none of the above

Question 17

Most of the waves in the electromagnetic spectrum are

Accepted Answer

A)  red light.
B)  blue light.
C)  green light.
D)  invisible.

Question 18

The speed of light in the void between molecules in glass is

Accepted Answer

A)  more than its speed in a vacuum.
B)  the same as its speed in a vacuum.
C)  less than its speed in a vacuum.

Question 19

Consider light energy that is momentarily absorbed in glass and then re-emitted. Compared to the absorbed light, the frequency of the re-emitted light is

Accepted Answer

A)  considerably less.
B)  slightly less.
C)  the same.
D)  slightly more.
E)  considerably more.

Question 20

What is the wavelength of an electromagnetic wave that has a frequency of 3 kilohertz?

Accepted Answer

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

Exam 26: Properties of Light

Most of the waves in the electromagnetic spectrum are

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What is the wavelength of an electromagnetic wave that has a frequency of 3 kilohertz?

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Radio waves travel

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Compared to its average speed in air, the average speed of a beam of light in glass is

Correct AnswerverifiedShow Answer

A solar eclipse occurs when the

Correct AnswerverifiedShow Answer

Which of the following is fundamentally different from the others?

Correct AnswerverifiedShow Answer

If the Sun were to disappear at this moment, we wouldn't know about it for

Correct AnswerverifiedShow Answer

The sensation of color is seen when light falls on the eye's

Correct AnswerverifiedShow Answer

The main difference between the retina of a human eye and that of a dog's eye is the

Correct AnswerverifiedShow Answer

Glass is transparent to wave frequencies that

Correct AnswerverifiedShow Answer

Your friend says that any radio wave travels appreciably faster than any sound wave.

Correct AnswerverifiedShow Answer

When visible light is incident upon clear glass, atoms in the glass

Correct AnswerverifiedShow Answer

The speed of light in the void between molecules in glass is

Correct AnswerverifiedShow Answer

A new Moon appears in the sky just before the time of a

Correct AnswerverifiedShow Answer

If the color spectrum ranges from red to violet, then it ranges from

Correct AnswerverifiedShow Answer

In free space, electromagnetic waves travel at a

Correct AnswerverifiedShow Answer

Which of these electromagnetic waves have the longest wavelength?

Correct AnswerverifiedShow Answer

When an astronaut on the Moon experiences a solar eclipse, observers on Earth see

Correct AnswerverifiedShow Answer

Our eyes are not very good at seeing

Correct AnswerverifiedShow Answer

Consider light energy that is momentarily absorbed in glass and then re-emitted. Compared to the absorbed light, the frequency of the re-emitted light is

Correct AnswerverifiedShow Answer

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