Wave Interactions — Unit test Answers
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Which diagram best shows the perceived sound wave heard by a woman after a police car has passed her?
A
An illustration of a person listening to the siren of a passing police car. There are circles spreading out from the siren with the wavelength close together in the front and farther apart in the back.
B
An illustration of a person listening to the siren of a passing police car. There are circles spreading out from the siren with the wavelength longer closer to the siren and closer together the farther from the siren on both sides.
C
An illustration of a person listening to the siren of a passing police car. There are circles spreading out from the siren that are concentric and evenly spaced.
D
An illustration of a person listening to the siren of a passing police car. There are circles spreading out from the siren with the wavelength changing in all directions.
22
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The diagram shows a wave traveling through a medium.
A
amplitudeB
crestC
troughD
wavelength23
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.24
Ten students stand in a circle and are told to make a transverse wave. What best describes the motion of the students?
A
Each student bumps the shoulder of his or her neighbor.B
At the exact time, all students take a step to the right.C
The students skip clockwise, going in a circular motion.D
One at a time, each student lifts his or her hands up and then down.25
The image shows water passing through a barrier.
A
absorptionB
diffractionC
reflectionD
refractionDid you find these answers helpful?
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