AnswersCrowley Credit Recovery Physics BWave Interactions

Wave Interactions Answers

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Sunlight is shown filtering through clouds.What wave phenomenon is responsible for the sunlight shown in this diagram?

Question illustration
A
diffraction, because light is bent around the clouds
B
refraction, because the light bends through the clouds
C
absorption, because the sunlight is absorbed by the clouds
D
transmission, because the sunlight travels through the clouds
2
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What is the purpose of a rearview mirror in a car?

A
The mirror allows the light to be absorbed so the driver will not see any glare.
B
The mirror allows the light to interfere so the light waves combine to form an image.
C
The mirror allows the light to be reflected so the objects behind the car can be seen.
D
The mirror allows the light to be transmitted so the light will not reach the driver's eyes.
3

The appearance of color is a result of the absorption and reflection of certain wavelengths of light. A shirt appears a certain color because it reflects that color of light. On the other hand, a shirt appears black when it absorbs all wavelengths of light and white when it reflects all wavelengths of light.

A
The temperature of the shirt will depend on how much sunlight is diffracted around the shirt.
B
The temperature of the shirt will not change because the sunlight is transmitted through the shirt to the body.
C
The temperature of the shirt will decrease because most of the light is reflected off of the shirt.
D
The temperature of the shirt will increase because all wavelengths of light are absorbed by the shirt.
4

What best describes the refraction of light rays?

A
light bouncing off of a mirror
B
light bending when it passes through a lens
C
light getting brighter when two waves combine
D
light passing through a clear glass window
5

Color is a result of the absorption and reflection of light. A shirt appears a color because it reflects that color of light. A shirt appears black when it absorbs all wavelengths of light.

A
The light is transmitted through the shirt, so no color appears.
B
The shirt absorbs the sunlight, so it appears white.
C
All the light is reflected, so the shirt appears white.
D
The sunlight refracts when it hits the shirt, so the shirt appears white.
6

The image shows water passing through a barrier.

Question illustration
A
absorption
B
diffraction
C
reflection
D
refraction
7

The two waves in the diagram are occupying the same place at the same time.At what time will the interfering waves have an amplitude of zero?

Question illustration
A
1.0
B
3.0
C
4.0
D
7.0
8

A lens focuses light at a single point called the focal point.

Question illustration
A
absorption
B
diffraction
C
reflection
D
refraction
9

Two wave pulses move toward each other along a rope.

Question illustration
A
A straight line.
Option A
B
A triangular crest.
Option B
C
A rectangular crest.
Option C
D
A triangular trough.
Option D
10

Which is the best example of the wave phenomenon called transmission?

A
A street is seen through a window.
B
Sound is heard around an open doorway.
C
A coin seems smaller at the bottom of a swimming pool.
D
An image of a tree is seen is on the surface of a smooth lake.
11

When two waves are in sync with each other and occupy the same place at the same time, how is the resulting wave determined?

A
by averaging the wavelengths of the two waves
B
by dividing the frequencies of the two waves
C
by multiplying the velocities of the two waves
D
by adding the amplitude of the two waves
12

[BLANK]

A
absorption
B
diffraction
C
reflection
D
refraction
13

In 1940, the Tacoma Narrows Bridge across the Puget Sound collapsed. The bridge was a suspension bridge. The wind blowing through the narrows matched the natural frequency of the bridge. This resulted in a large movement of roadway, which eventually caused the bridge to fail.

A
absorption, because the bridge absorbed all the energy of the wind
B
diffraction, because the wind moved around the bridge, which set the bridge into motion
C
interference, because constructive interference occurred when the wind frequency matched the natural frequency of the bridge
D
interference, because destructive interference occurred when the wind frequency matched the natural frequency of the bridge
14

What is the purpose of a rearview mirror in a car?

A
The mirror allows the light to be absorbed so the driver will not see any glare.
B
The mirror allows the light to interfere so the light waves combine to form an image.
C
The mirror allows the light to be reflected so the objects behind the car can be seen.
D
The mirror allows the light to be transmitted so the light will not reach the driver's eyes.
15

What best describes the refraction of light rays?

A
light bouncing off of a mirror
B
light bending when it passes through a lens
C
light getting brighter when two waves combine
D
light passing through a clear glass window
16

When a DVD is played, a laser light hits the surface of the disk and then returns to the detector.

Question illustration
A
absorption
B
interference
C
reflection
D
refraction
17

Two pulses are moving along a string. One pulse is moving to the right and the second is moving to the left. Both pulses reach point P at the same instant.

Question illustration
A
An illustration with the triangular trough in the middle of the rectangular crest to the left of point P.
Option A
B
An illustration with the triangular trough in the middle of the rectangular crest to the right of point P.
Option B
C
An illustration with a rectangular crest moving toward the right past P and a triangular trough going toward the left past P.
Option C
D
An illustration with a rectangular crest moving toward the left and a triangular trough going toward the right both away from point P and equidistant from P.
Option D
18

If a soundproof door is almost shut but still leaves a small opening, what wave phenomenon is responsible for someone being able to hear sound from the room while standing by the wall to the side of the opening?

A
absorption
B
diffraction
C
reflection
D
refraction
19

[BLANK]

A
absorbed
B
transmitted
C
reflected
D
refracted
20

Consider this image of a wave.

Question illustration
A
A graph with time in second on the x axis from 0 to 8 and amplitude on the y axis from 2 to 2. The wave starts at the origin and the trough goes up to .8, back down through .75 s and all the way down to 2 before going back up to 2 on the other side of the x axis. It is a repeated pattern with on trough and 3 crests with different amplitude.
Option A
B
A graph with time in second on the x axis from 0 to 8 and amplitude on the y axis from 2 to 2. The wave starts at the origin and the trough goes down to 2, back up through 1 s and all the way up to .7 before going back down to .2 on the other side of the x axis. It is a repeated pattern with on trough and 3 crests with different amplitude.
Option B
C
A graph with time in second on the x axis from 0 to 8 and amplitude on the y axis from 2 to 2. The wave starts at the origin and the trough goes down to .6, back up through 1s and all the way up to .6 before going back down to .4 on the other side of the x axis. It is a repeated pattern with on trough and 3 crests with different amplitude.
Option C
D
A graph with time in second on the x axis from 0 to 8 and amplitude on the y axis from 2 to 2. The wave starts at the origin and the trough goes down to 2, back up through 1s and all the way up to .7 before going back down to .2 on the other side of the x axis. Then back up to .3 on the other side of the x axis. The pattern repeats itself but flipped on the x axis
Option D

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