Unit Test — Unit test Answers

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21
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A museum sets up a display of fluorescent minerals. Which best describes how electromagnetic waves can be used to enhance the display?

A
Infrared light shining on the minerals will cause them to give off visible light.
B
Visible light shining on the minerals will cause them to give off infrared light.
C
Ultraviolet light shining on the minerals will cause them to give off visible light.
D
Visible light shining on the minerals will cause them to give off ultraviolet light.
22
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If humans cannot see ultraviolet waves, how can ultraviolet light be used to gather evidence of a crime?

A
Ultraviolet light detects the presence of radioactive substances.
B
Ultraviolet light shows cold areas as blue and warm areas as red.
C
Ultraviolet light causes substances to fluoresce and give off visible light.
D
Ultraviolet light transmits information to AM and FM radio receivers.
23

Which best describes the order of the technology used to transmit a sound through the radio?

A
microphone → transmitter → microphone
B
radio → transmitter → radio
C
radio → transmitter → microphone
D
microphone → transmitter → radio
25

What will occur when the trough of Wave A overlaps the crest of Wave B?

A
Destructive interference will occur, causing the new wave to have more energy than Wave A or Wave B.
B
Constructive interference will occur, causing the new wave to have more energy than Wave A or Wave B.
C
Destructive interference will occur, causing the new wave to have less energy than Wave A or Wave B.
D
Constructive interference will occur, causing the new wave to have less energy than Wave A or Wave B.

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