Waves Unit Test

Question

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Question
How are visible light, the electromagnetic spectrum, and photoreceptors in the eye related?(1 point)
Responses

Photoreceptors in the eye detect visible light, which is part of the wider electromagnetic spectrum.
Photoreceptors in the eye detect visible light, which is part of the wider electromagnetic spectrum.

Photoreceptors in the eye detect visible light, which contains a range known as the electromagnetic spectrum.
Photoreceptors in the eye detect visible light, which contains a range known as the electromagnetic spectrum.

Photoreceptors in the eye detect the electromagnetic spectrum, which is part of the wider visible light range.
Photoreceptors in the eye detect the electromagnetic spectrum, which is part of the wider visible light range.

Photoreceptors in the eye detect the electromagnetic spectrum, which contains a range known as visible light.

Answer 1

Photoreceptors in the eye detect the electromagnetic spectrum, which contains a range known as visible light.

Answer 2

Waves Unit Test
7 of 107 of 10 Items

Question
A student drops a rock in a pond and notices that her reflection in the water becomes less clear. Which statement best explains the student’s observation?(1 point)
Responses

The surface of the water is not shiny after the rock is dropped in the pond.
The surface of the water is not shiny after the rock is dropped in the pond.

The surface of the water is no longer hard after the rock is dropped in the pond.
The surface of the water is no longer hard after the rock is dropped in the pond.

The water is not able to reflect waves after the rock is dropped in the pond.
The water is not able to reflect waves after the rock is dropped in the pond.

The water is not a smooth surface after the rock is dropped in the pond.

Answer 3

The water is not a smooth surface after the rock is dropped in the pond.

Answer 4

Waves Unit Test
8 of 108 of 10 Items

Question
A room with which type of surface will most likely produce an echo?(1 point)
Responses

carpet
carpet

glass
glass

dirt
dirt

foam
foam

Answer 5

A room with a glass surface will most likely produce an echo.

Answer 6

Question
The formula vw=f⋅λ
describes the relationship between the speed of a wave ( vw
), and its frequency ( f
) and wavelength ( λ
).

For example, if a wave has a frequency of 120 Hz and a wavelength of 5m, it would have a speed of 600 m/s.

In one or two sentences, describe what would happen to the frequency of this wave if the wavelength is increased to 10m but the speed stays the same at 600 m/s.

(2 points)

Answer 7

If the wavelength of the wave is increased to 10m while the speed remains the same, the frequency of the wave would decrease.

Answer 8

A student performs an experiment by ringing a bell in the air and in a pool and measuring the time it takes for a friend to hear the bell. In one or two sentences, make and justify a hypothesis on which medium the friend would hear the bell the fastest.(2 points)

Answer 9

The friend would hear the bell fastest in the air compared to in the pool because sound waves travel faster in air than in water.