Question 1

Consider light energy that is momentarily absorbed in glass and then reemitted. Relative to the absorbed light, the frequency of the reemitted light is

Accepted Answer

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

Question 2

A weight on an end of a spring bobs up and down one complete cycle every 2 s. Its frequency is

Accepted Answer

A) 0)5 Hz. 
B) 1 Hz. 
C) 2 Hz. 
D) none of the above 
A) 0)5 Hz. 
B) 1 Hz. 
C) 2 Hz. 
D) none of the above

Question 3

For light, a red shift indicates the light source moves

Accepted Answer

A) toward you. 
B) away from you. 
C) at right angles to you. 
D) actually, all of the above 
E) none of the above 
A) toward you. 
B) away from you. 
C) at right angles to you. 
D) actually, all of the above 
E) none of the above

Question 4

The type of lens that spreads parallel light is a

Accepted Answer

A) converging lens. 
B) diverging lens. 
C) combination converging-diverging lens. 
A) converging lens. 
B) diverging lens. 
C) combination converging-diverging lens.

Question 5

A skipper on a boat notices wave crests passing the anchor chain every 5 s. The skipper estimates the distance between crests is 15 m. What is the speed of the water waves?

Accepted Answer

A) 3 m/s 
B) 5 m/s 
C) 15 m/s 
D) not enough information given 
A) 3 m/s 
B) 5 m/s 
C) 15 m/s 
D) not enough information given

Question 6

If the Sun were to disappear right now, we wouldn't know about it for 8 minutes because it takes 8 minutes

Accepted Answer

A) for the Sun to disappear. 
B) to operate receiving equipment in the dark. 
C) for light to travel from the Sun to Earth. 
D) all of the above 
E) none of the above 
A) for the Sun to disappear. 
B) to operate receiving equipment in the dark. 
C) for light to travel from the Sun to Earth. 
D) all of the above 
E) none of the above

Question 7

Double the frequency of sound and you also double its

Accepted Answer

A) wavelength. 
B) speed. 
C) amplitude. 
D) all of the above 
E) none of the above 
A) wavelength. 
B) speed. 
C) amplitude. 
D) all of the above 
E) none of the above

Question 8

Relative to ultraviolet waves, the wavelength of infrared waves is

Accepted Answer

A) shorter. 
B) longer. 
C) the same. 
A) shorter. 
B) longer. 
C) the same.

Question 9

A wiggle in time is a

Accepted Answer

A) vibration. 
B) wave. 
C) both A and B 
D) neither A nor B 
A) vibration. 
B) wave. 
C) both A and B 
D) neither A nor B

Question 10

What is an echo, and why is it weaker than the original sound?

Accepted Answer

An echo is simply reflected sound. Becau

Question 11

Light travels faster in

Accepted Answer

A) warm air. 
B) cool air. 
C) a vacuum. 
A) warm air. 
B) cool air. 
C) a vacuum.

Question 12

The Doppler effect is characteristic of

Accepted Answer

A) water waves. 
B) sound waves. 
C) light waves. 
D) all of the above 
E) none of the above 
A) water waves. 
B) sound waves. 
C) light waves. 
D) all of the above 
E) none of the above

Question 13

If at a concert, a wind blows directly from the orchestra toward you, the frequency of the sound you hear will be

Accepted Answer

A) decreased. 
B) increased. 
C) neither decreased nor increased. 
A) decreased. 
B) increased. 
C) neither decreased nor increased.

Question 14

Distinguish between a transverse wave and a longitudinal wave. Give examples of each.

Accepted Answer

All waves are vibrations in space and ti

Question 15

Sound will be louder if a struck tuning fork is held

Accepted Answer

A) in the air. 
B) with its base against a table top. 
C) with its prongs in shallow water. 
D) same in all these cases 
A) in the air. 
B) with its base against a table top. 
C) with its prongs in shallow water. 
D) same in all these cases

Question 16

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

Accepted Answer

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

Question 17

The period of the second hand on a clock is

Accepted Answer

A) 1 s. 
B) 1/60 s. 
C) 60 s. 
D) 3600 s. 
E) 12 h. 
A) 1 s. 
B) 1/60 s. 
C) 60 s. 
D) 3600 s. 
E) 12 h.

Question 18

Your favorite song will sound the loudest

Accepted Answer

A) in your air-filled room. 
B) underwater. 
C) in outer space. 
D) behind a wall. 
A) in your air-filled room. 
B) underwater. 
C) in outer space. 
D) behind a wall.

Question 19

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 20

The least amount of energy is required to produce forced vibration in an object

Accepted Answer

A) below its natural frequency. 
B) at its natural frequency. 
C) above its natural frequency. 
A) below its natural frequency. 
B) at its natural frequency. 
C) above its natural frequency.

Exam 8: Waves-Sound and Light

Consider light energy that is momentarily absorbed in glass and then reemitted. Relative to the absorbed light, the frequency of the reemitted light is

A weight on an end of a spring bobs up and down one complete cycle every 2 s. Its frequency is

For light, a red shift indicates the light source moves

The type of lens that spreads parallel light is a

A skipper on a boat notices wave crests passing the anchor chain every 5 s. The skipper estimates the distance between crests is 15 m. What is the speed of the water waves?

If the Sun were to disappear right now, we wouldn't know about it for 8 minutes because it takes 8 minutes

Double the frequency of sound and you also double its

Relative to ultraviolet waves, the wavelength of infrared waves is

A wiggle in time is a

What is an echo, and why is it weaker than the original sound?

Light travels faster in

The Doppler effect is characteristic of

If at a concert, a wind blows directly from the orchestra toward you, the frequency of the sound you hear will be

Distinguish between a transverse wave and a longitudinal wave. Give examples of each.

Sound will be louder if a struck tuning fork is held

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

The period of the second hand on a clock is

Your favorite song will sound the loudest

The natural frequency of the atoms in glass is in the

The least amount of energy is required to produce forced vibration in an object

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