Question 1

What is resonance and what conditions cause it? Give examples.

Accepted Answer

Resonance is an unusually large increase in amplitude when a system is driven at its natural frequency by an outside force. A good example is someone pushing another person on a swing. When the pushes are in rhythm with the natural swing motion, very soon the swing is high in the air with little effort by the person doing the pushing. Another example is the sounding of a tuning fork by the vibrations of another nearby fork of matched frequency. Another example is the destruction of a bridge when small pushes are applied in rhythm with the natural frequency of the bridge.

Question 2

Some of a wave's energy dissipates as heat. In time, this will reduce the wave's

Accepted Answer

A) speed. 
B) wavelength. 
C) amplitude. 
D) frequency. 
E) period. 
A) speed. 
B) wavelength. 
C) amplitude. 
D) frequency. 
E) period. C

Question 3

Glass is opaque to light with wave frequencies that

Accepted Answer

A) match its natural frequencies. 
B) are below its natural frequencies. 
C) both A and B 
D) none of the above 
A) match its natural frequencies. 
B) are below its natural frequencies. 
C) both A and B 
D) none of the above A

Question 4

Diffuse reflection occurs when the size of surface irregularities is

Accepted Answer

A) small compared to the wavelength of the light used. 
B) large compared to the wavelength of the light used. 
A) small compared to the wavelength of the light used. 
B) large compared to the wavelength of the light used.

Question 5

A sheet of red paper will look black when illuminated with

Accepted Answer

A) red light. 
B) yellow light. 
C) magenta light. 
D) cyan light. 
E) none of the above 
A) red light. 
B) yellow light. 
C) magenta light. 
D) cyan light. 
E) none of the above

Question 6

What is the Doppler effect, and how is it produced? Cite two examples.

Accepted Answer

The Doppler effect is an increase or dec

Question 7

A wave having a frequency of 1000 Hz vibrates at

Accepted Answer

A) less than 1000 cycles per second. 
B) 1000 cycles per second. 
C) more than 1000 cycles per second. 
A) less than 1000 cycles per second. 
B) 1000 cycles per second. 
C) more than 1000 cycles per second.

Question 8

The incident light ray, the reflected light ray, and the normal between them

Accepted Answer

A) lie in the same plane. 
B) may or may not lie in the same plane. 
C) lie in planes that are perpendicular to one another. 
A) lie in the same plane. 
B) may or may not lie in the same plane. 
C) lie in planes that are perpendicular to one another.

Question 9

The amplitude of a particular wave is 1 m. The top to bottom distance of the disturbance is

Accepted Answer

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

Question 10

Which of the following is not a transverse wave?

Accepted Answer

A) sound 
B) light 
C) radio 
D) all of the above 
E) none of the above 
A) sound 
B) light 
C) radio 
D) all of the above 
E) none of the above

Question 11

Waves diffract the most when their wavelength is

Accepted Answer

A) short. 
B) long. 
C) Both diffract the same. 
A) short. 
B) long. 
C) Both diffract the same.

Question 12

The brightest color emitted by the Sun is

Accepted Answer

A) red. 
B) orange. 
C) yellow-green. 
D) green-blue. 
E) violet. 
A) red. 
B) orange. 
C) yellow-green. 
D) green-blue. 
E) violet.

Question 13

How many vibrations per second are associated with a 101-MHz radio wave?

Accepted Answer

A) less than 101,000,000 
B) 101,000,000 
C) more than 101,000,000 
A) less than 101,000,000 
B) 101,000,000 
C) more than 101,000,000

Question 14

Why is hearing better in an auditorium with grooves in the walls than with flat walls?

Accepted Answer

Grooves in the wall reflect sound in man

Question 15

The energy of sound in air eventually becomes

Accepted Answer

A) increased internal energy of the air. 
B) weaker and weaker until it disappears. 
C) cancelled by destructive interference. 
D) cancelled by both destructive and constructive interference. 
A) increased internal energy of the air. 
B) weaker and weaker until it disappears. 
C) cancelled by destructive interference. 
D) cancelled by both destructive and constructive interference.

Question 16

What are the three primary colors for light addition? What colors appear when light of only two primary colors are shone on a white screen? How would the color purple be produced?

Accepted Answer

The three primary colors are red, green,

Question 17

Color depends on what characteristic of light?

Accepted Answer

A) its frequency 
B) its wavelength 
C) both A and B 
D) neither A nor B 
A) its frequency 
B) its wavelength 
C) both A and B 
D) neither A nor B

Question 18

A wave travels an average distance of 1 m in 1 s with a frequency of 1 Hz. Its amplitude is

Accepted Answer

A) less than 1 m. 
B) 1 m. 
C) more than 1 m. 
D) not enough information given 
A) less than 1 m. 
B) 1 m. 
C) more than 1 m. 
D) not enough information given

Question 19

What color light is transmitted by a piece of blue glass?

Accepted Answer

A) red 
B) white 
C) blue 
D) yellow 
E) orange 
A) red 
B) white 
C) blue 
D) yellow 
E) orange

Question 20

Diffraction is more pronounced through relatively

Accepted Answer

A) small openings. 
B) large openings. 
C) same for each 
A) small openings. 
B) large openings. 
C) same for each

Exam 8: Waves-Sound and Light

What is resonance and what conditions cause it? Give examples.

Some of a wave's energy dissipates as heat. In time, this will reduce the wave's

Glass is opaque to light with wave frequencies that

Diffuse reflection occurs when the size of surface irregularities is

A sheet of red paper will look black when illuminated with

What is the Doppler effect, and how is it produced? Cite two examples.

A wave having a frequency of 1000 Hz vibrates at

The incident light ray, the reflected light ray, and the normal between them

The amplitude of a particular wave is 1 m. The top to bottom distance of the disturbance is

Which of the following is not a transverse wave?

Waves diffract the most when their wavelength is

The brightest color emitted by the Sun is

How many vibrations per second are associated with a 101-MHz radio wave?

Why is hearing better in an auditorium with grooves in the walls than with flat walls?

The energy of sound in air eventually becomes

What are the three primary colors for light addition? What colors appear when light of only two primary colors are shone on a white screen? How would the color purple be produced?

Color depends on what characteristic of light?

A wave travels an average distance of 1 m in 1 s with a frequency of 1 Hz. Its amplitude is

What color light is transmitted by a piece of blue glass?

Diffraction is more pronounced through relatively

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