Quiz 2

Question 1

When we consider how frequently a pendulum swings to and fro, we’re talking about its

a. frequency.
b. period.
c. wavelength.
d. amplitude.

Answer 1

frequency

Question 2

If the frequency of a particular wave is 20 Hertz, its period is

A. 1/20 second.
B. 20 seconds.
C. more than 20 seconds.
D. none of the above

Answer 2

1/20 second

Question 3

The distance between adjacent peaks in the direction of travel for a transverse wave is its

A. frequency.
B. period.
C. wavelength.
D. amplitude.

Answer 3

wavelength

Question 4

The vibrations along a transverse wave move in a direction________ to the wave

A. along the wave.
B. perpendicular to the wave.
C. both of the above
D. neither of the above

Answer 4

perpendicular

Question 5

The vibrations along a longitudinal wave move in a direction

A. along the wave.
B. perpendicular to the wave.
C. both of the above
D. neither of the above

Answer 5

along the wave

Question 5

The speed of sound varies with

A. Amplitude
B. Frequency
C. Temperature
D. All of the above

Answer 5

temperature

Question 5

Which signal will the person hear first?

A. Radio Signal
B. Nonbroadcast sound signal
C. Both at the same time
D. None of the above

Answer 5

Both at the same time

Question 5

Compared with the speed of a sound wave, a radio wave travels

A. Most often, faster.
B. Faster always in all conditions
C. About the same speed as a sound wave in the same temperature air.
C. Slower under some conditions

Answer 5

faster always in all conditions

Question 6

The reflection of a sound wave is known as its

A. Pitch.
B. Harmony.
C. Echo.
D. virtual image.

Answer 6

Echo

Question 7

Compared with a dry road, seeing is difficult when driving at night on a wet road. Why?
A. Wet surface is smooth with less diffuse reflection, part of which would otherwise reach the driver’s eyes.
B. Wet road usually means a wet windshield.
C. Wet road usually means more vapor in the air.
D. There is no reason—that’s just the way it is.

Answer 7

Wet surface is smooth with less diffuse reflection, part of which would otherwise reach the driver’s eyes

Question 8

The law of reflection applies to

A. Light.
B. Sound.
C. Both of the above.
D. None of the above.

Answer 8

Both of the above

Question 9

Refraction occurs when a wave travels from

A. air to water.
B. water to air.
C. a dense part of a medium to a less dense part, air for example.
D. All of the above.

Answer 9

All of the above

Question 10

When an object is set vibrating by a wave that has a frequency that matches the natural frequency of the object, what occurs is

A. forced vibration.
B.resonance.
C.refraction.
D.diffraction

Answer 10

resonance

Question 11

Interference is a property of

A. sound.
B. light.
C. both sound and light.
D. neither sound nor light.

Answer 11

both sound and light

Question 12

Sound waves can be cancelled by the process of

A. multiple reflections.
B. double refraction.
C. resonance.
D. None of these.

Answer 12

None of these

Question 13

The regions of a standing wave with zero amplitude are known as

A. overtones.
B. antinodes.
C. troughs.
D. nodes.

Answer 13

Nodes

Question 14

Which of these is not in the same family

a. Sound.
b. Light.
c. Infrared radiation.
d. Radio waves.

Answer 14

Sound

Question 15

The electromagnetic spectrum is a span of electromagnetic waves, ranging from lowest to highest frequencies. The smallest portion of the electromagnetic spectrum is that of

A. radio waves.
B. microwaves.
C. visible light.
D. gamma rays.

Answer 15

visible light

Question 16

Which of these colors corresponds to the highest frequency?

a. Red.
b. Green.
c. Blue.
d. Violet.

Answer 16

Violet

Question 17

A photographer wishes to photograph a lightning bolt by setting his camera so that it is triggered by the sound of thunder. Is this a good idea or a poor idea?

A. Good idea for nearby lightning strikes
B. Good idea for all strikes
C. Poor idea for nearby lightning strikes
D. Poor idea for all strikes

Answer 17

Poor idea for all strikes

Question 18

An axis of sight is reversed when you look at yourself in a plane mirror. That reversed axis is

a.left and right.
b.up and down.
c.front and back.
d.None are really reversed.

Answer 18

front and back

Question 19

Diffuse reflection occurs when the sizes of surface irregularities are

a. small compared to the wavelength of reflected radiation.
b. large compared to the wavelength of reflected radiation.
c. both of the above.
d. none of the above.

Answer 19

large compared to the wavelength of reflected radiation

Question 20

When ultraviolet light shines on glass, electrons in the glass material are made to

a. resonate.
b. undergo excitation.
c. reflect.
d. Refract.

Answer 20

resonate

Question 21

When Infrared radiation shines on glass, molecules in the glass material are made to

a. resonate.
b. undergo excitation.
c. reflect.
d. Refract.

Answer 21

undergo excitation

Question 22

Strictly speaking, the photons of light incident on glass are

A. also the ones that travel through and exit the other side.
B. not the ones that travel through and exit the other side.
C. absorbed and transformed to thermal energy.
D. diffracted.

Answer 22

not the ones that travel through and exit the other side.