Introduction to Waves — Unit test

Question 1

What best describes white light as it travels through a prism? Check all that apply.

Revolt · Accepted Answer

The light slows down.; The light bends in the prism.; Light reflects off of the surface of the prism.; The white light breaks into its component colors.

Question 2

A boy yells in a narrow valley. The sound reflects off of a boulder that is 80 m away. How long will it take to hear the echo if the speed of a sound wave is 320 m/s?(speed = )

Revolt · Accepted Answer

0.50 seconds for the sound to travel to the boulder and return as an echo

Question 3

Which are examples of resonance? Check all that apply.the volume on a stereo being turned upa note being played on a saxophonean opera singer breaking a glass with her voicea person pushing a swing at the rate it naturally oscillates back and forthan echo

Revolt · Accepted Answer

a note being played on a saxophone; an opera singer breaking a glass with her voice; a person pushing a swing at the rate it naturally oscillates back and forth

Question 4

What best explains why a person can become sunburned by spending too much time at the beach?

Revolt · Accepted Answer

Sunlight is an electromagnetic wave carrying energy that is absorbed by the skin.

Question 5

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 X at the same instant.

Revolt · Accepted Answer

Yes, the overlap will occur during the slope of the waves.

Question 6

Which animals can hear a sound wave that has 18,500 cycles in 0.75 seconds? Check all that apply.

Revolt · Accepted Answer

bats; moths; cats

Question 7

Visible light travels at a speed 3.0 × 108 of m/s. If red light has a wavelength of 6.5 × 10–7 m, what the frequency of this light?

Revolt · Accepted Answer

4.6 × 1014 HZ

Question 8

_______interference occurs when two waves overlap and the resulting wave has a larger amplitude.

Revolt · Accepted Answer

Constructive

Question 9

A longitudinal wave is shown.

Revolt · Accepted Answer

B

Question 10

The table below shows the speed of sound waves from musical sound sources at 20°C.Which conclusion can be made based on the information in the table?

Revolt · Accepted Answer

Wavelengths and frequency can vary inversely to produce the same wave speed.

Introduction to Waves — Unit test Answers

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