Question 1

What is wave interference, and what two types are there?

Accepted Answer

Wave interference is the result of two o

Question 2

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 3

The source of all electromagnetic waves is

Accepted Answer

A) heat. 
B) magnetic fields. 
C) electric fields. 
D) vibrating charges. 
E) none of the above 
A) heat. 
B) magnetic fields. 
C) electric fields. 
D) vibrating charges. 
E) none of the above

Question 4

If the frequency of a certain wave is 10 Hz, its period is

Accepted Answer

A) 0)1 s. 
B) 10 s. 
C) 100 s. 
D) none of the above 
A) 0)1 s. 
B) 10 s. 
C) 100 s. 
D) none of the above

Question 5

The speed of a sound wave in air depends on

Accepted Answer

A) its frequency. 
B) its wavelength. 
C) the air temperature. 
D) all of the above 
E) none of the above 
A) its frequency. 
B) its wavelength. 
C) the air temperature. 
D) all of the above 
E) none of the above

Question 6

The source of all sounds is something that is

Accepted Answer

A) vibrating. 
B) moving. 
C) accelerating. 
D) undergoing simple harmonic motion. 
E) a net emitter of energy. 
A) vibrating. 
B) moving. 
C) accelerating. 
D) undergoing simple harmonic motion. 
E) a net emitter of energy.

Question 7

What is the wavelength of an electromagnetic wave that has a frequency of 1 Hz?

Accepted Answer

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

Question 8

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

Accepted Answer

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

Question 9

Compressions and rarefactions normally travel in

Accepted Answer

A) the same direction in a wave. 
B) opposite directions in a wave. 
A) the same direction in a wave. 
B) opposite directions in a wave.

Question 10

A red crab very deep in water, where sunlight is dim, appears

Accepted Answer

A) red. 
B) orange. 
C) cyan. 
D) brown. 
E) no color-black. 
A) red. 
B) orange. 
C) cyan. 
D) brown. 
E) no color-black.

Question 11

What is the approximate range for human hearing?

Accepted Answer

A) ten to one-hundred Hertz 
B) twenty to twenty-thousand Hertz 
C) ninety to ninety-thousand Hertz 
D) one-hundred to one million Hertz 
A) ten to one-hundred Hertz 
B) twenty to twenty-thousand Hertz 
C) ninety to ninety-thousand Hertz 
D) one-hundred to one million Hertz

Question 12

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

Accepted Answer

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

Question 13

A diver shines light up to the surface of a smooth pond at a 10° angle to the normal. Some light passes into the air above, and the part that reflects back into the water makes an angle to the normal of

Accepted Answer

A) less than 10°. 
B) 10°. 
C) more than 10°. 
A) less than 10°. 
B) 10°. 
C) more than 10°.

Question 14

The color of an opaque object is the same as the light that is

Accepted Answer

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

Question 15

For radio reception, diffraction is

Accepted Answer

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

Question 16

The explanation for refraction must involve a change in

Accepted Answer

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

Question 17

Which doesn't belong to the same family?

Accepted Answer

A) infrasonic waves 
B) ultrasonic waves 
C) radio waves 
D) shock waves 
E) longitudinal waves 
A) infrasonic waves 
B) ultrasonic waves 
C) radio waves 
D) shock waves 
E) longitudinal waves

Question 18

A mass on the end of a spring bobs up and down 1 complete cycle every 2 s. Its frequency is

Accepted Answer

A) 0)5 Hz. 
B) 2 Hz. 
C) neither A nor B 
A) 0)5 Hz. 
B) 2 Hz. 
C) neither A nor B

Question 19

When ultraviolet light is incident upon glass, atoms in the glass

Accepted Answer

A) are forced into vibration. 
B) resonate. 
C) pass the light energy along practically undiminished. 
D) freely absorb and reemit most of the ultraviolet light. 
A) are forced into vibration. 
B) resonate. 
C) pass the light energy along practically undiminished. 
D) freely absorb and reemit most of the ultraviolet light.

Question 20

Is light a wave or particle?

Accepted Answer

A) wave 
B) particle 
C) both 
D) neither 
A) wave 
B) particle 
C) both 
D) neither

Exam 8: Waves-Sound and Light

What is wave interference, and what two types are there?

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

The source of all electromagnetic waves is

If the frequency of a certain wave is 10 Hz, its period is

The speed of a sound wave in air depends on

The source of all sounds is something that is

What is the wavelength of an electromagnetic wave that has a frequency of 1 Hz?

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

Compressions and rarefactions normally travel in

A red crab very deep in water, where sunlight is dim, appears

What is the approximate range for human hearing?

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

A diver shines light up to the surface of a smooth pond at a 10° angle to the normal. Some light passes into the air above, and the part that reflects back into the water makes an angle to the normal of

The color of an opaque object is the same as the light that is

For radio reception, diffraction is

The explanation for refraction must involve a change in

Which doesn't belong to the same family?

A mass on the end of a spring bobs up and down 1 complete cycle every 2 s. Its frequency is

When ultraviolet light is incident upon glass, atoms in the glass

Is light a wave or particle?

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