Question 1

A floating leaf oscillates up and down two complete cycles in 1 s as a water wave passes by. The wave's wavelength is 10 m. What is the wave's speed?

Accepted Answer

A) 2 m/s 
B) 10 m/s 
C) 20 m/s 
D) 40 m/s 
E) more than 40 m/s 
A) 2 m/s 
B) 10 m/s 
C) 20 m/s 
D) 40 m/s 
E) more than 40 m/s

Question 2

Refraction of sound can occur in

Accepted Answer

A) air. 
B) water. 
C) both A and B 
D) neither A nor B 
A) air. 
B) water. 
C) both A and B 
D) neither A nor B

Question 3

Sound waves cannot travel in

Accepted Answer

A) air. 
B) water. 
C) steel. 
D) a vacuum. 
E) They can travel in all of the above. 
A) air. 
B) water. 
C) steel. 
D) a vacuum. 
E) They can travel in all of the above.

Question 4

If an electric charge is shaken up and down,

Accepted Answer

A) sound is emitted. 
B) light is emitted. 
C) electron excitation occurs. 
D) a magnetic field is created. 
E) its mass decreases. 
A) sound is emitted. 
B) light is emitted. 
C) electron excitation occurs. 
D) a magnetic field is created. 
E) its mass decreases.

Question 5

Sound travels faster in

Accepted Answer

A) air. 
B) water. 
C) steel. 
D) a vacuum. 
E) about the same speed in all of the above 
A) air. 
B) water. 
C) steel. 
D) a vacuum. 
E) about the same speed in all of the above

Question 6

If you double the frequency of a vibrating object, its period

Accepted Answer

A) doubles. 
B) halves. 
C) is quartered. 
A) doubles. 
B) halves. 
C) is quartered.

Question 7

The greenish blue of water is evidence of the

Accepted Answer

A) reflection of greenish-blue light. 
B) reflection of red light. 
C) absorption of greenish-blue light. 
D) absorption of red light. 
E) interaction between green and blue frequencies of light. 
A) reflection of greenish-blue light. 
B) reflection of red light. 
C) absorption of greenish-blue light. 
D) absorption of red light. 
E) interaction between green and blue frequencies of light.

Question 8

Electromagnetic waves consist of

Accepted Answer

A) compressions and rarefactions of electromagnetic pulses. 
B) vibrating electric and magnetic fields. 
C) particles of light energy. 
D) high-frequency gravitational waves. 
A) compressions and rarefactions of electromagnetic pulses. 
B) vibrating electric and magnetic fields. 
C) particles of light energy. 
D) high-frequency gravitational waves.

Question 9

When you tune a radio to a certain station, you match the frequency of the internal electrical circuit to the frequency of that radio station. In so doing, you are employing the principle of

Accepted Answer

A) forced vibrations. 
B) resonance. 
C) beats. 
D) reverberation. 
E) wave interference. 
A) forced vibrations. 
B) resonance. 
C) beats. 
D) reverberation. 
E) wave interference.

Question 10

The main difference between a radio wave and a light wave is its

Accepted Answer

A) speed. 
B) wavelength. 
C) frequency. 
D) all of the above 
E) two of these 
A) speed. 
B) wavelength. 
C) frequency. 
D) all of the above 
E) two of these

Question 11

If an electron vibrates up and down 1000 times each second, it generates an electromagnetic wave having a

Accepted Answer

A) period of 1000 s. 
B) speed of 1000 m/s. 
C) wavelength of 1000 m. 
D) frequency of 1000 Hz. 
E) wavelength of 1000 km. 
A) period of 1000 s. 
B) speed of 1000 m/s. 
C) wavelength of 1000 m. 
D) frequency of 1000 Hz. 
E) wavelength of 1000 km.

Question 12

In designing a music hall, an acoustical engineer deals mainly with

Accepted Answer

A) modulation. 
B) forced vibrations. 
C) resonance. 
D) beats. 
E) wave interference. 
A) modulation. 
B) forced vibrations. 
C) resonance. 
D) beats. 
E) wave interference.

Question 13

Unlike a transverse wave, a longitudinal wave has no

Accepted Answer

A) amplitude. 
B) frequency. 
C) wavelength. 
D) speed. 
E) all of the above 
A) amplitude. 
B) frequency. 
C) wavelength. 
D) speed. 
E) all of the above

Question 14

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

Question 15

For viewing tiny objects in a microscope, diffraction is

Accepted Answer

A) helpful. 
B) a hindrance. 
C) not a factor. 
A) helpful. 
B) a hindrance. 
C) not a factor.

Question 16

A floating object oscillates up and down two complete cycles in 1 s as a water wave of wavelength 5 m passes by. The speed of the wave is

Accepted Answer

A) 2 m/s. 
B) 5 m/s. 
C) 10 m/s. 
D) 15 m/s. 
E) none of the above 
A) 2 m/s. 
B) 5 m/s. 
C) 10 m/s. 
D) 15 m/s. 
E) none of the above

Question 17

On a color TV screen, red, green, and blue spots of fluorescent materials are illuminated at a variety of relative intensities to produce a full spectrum of colors. What spots are activated to produce yellow? Red? Magenta? White?

Accepted Answer

Yellow is produced by simultan

Question 18

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 19

What is refraction, and how does it occur?

Accepted Answer

Refraction is the bending of a wave (sou

Question 20

Sound waves can interfere with one another so that no sound results.

Accepted Answer

A) True 
B) False 
A) True 
B) False

Exam 8: Waves-Sound and Light

A floating leaf oscillates up and down two complete cycles in 1 s as a water wave passes by. The wave's wavelength is 10 m. What is the wave's speed?

Refraction of sound can occur in

Sound waves cannot travel in

If an electric charge is shaken up and down,

Sound travels faster in

If you double the frequency of a vibrating object, its period

The greenish blue of water is evidence of the

Electromagnetic waves consist of

When you tune a radio to a certain station, you match the frequency of the internal electrical circuit to the frequency of that radio station. In so doing, you are employing the principle of

The main difference between a radio wave and a light wave is its

If an electron vibrates up and down 1000 times each second, it generates an electromagnetic wave having a

In designing a music hall, an acoustical engineer deals mainly with

Unlike a transverse wave, a longitudinal wave has no

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

For viewing tiny objects in a microscope, diffraction is

A floating object oscillates up and down two complete cycles in 1 s as a water wave of wavelength 5 m passes by. The speed of the wave is

On a color TV screen, red, green, and blue spots of fluorescent materials are illuminated at a variety of relative intensities to produce a full spectrum of colors. What spots are activated to produce yellow? Red? Magenta? White?

Materials generally become warmer when light is

What is refraction, and how does it occur?

Sound waves can interfere with one another so that no sound results.

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