AnswersReed Fall 2026 Physical Science 2nd Semester 7th HourUsing Light

Using Light — Unit test Answers

4 verified answers
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

An endoscope is a fiber-optic medical instrument that emits light. Doctors can insert endoscopes into hollow body parts. Which property of fiber-optic strands makes them most useful in endoscopes?

A
They can create virtual images.
B
They are decorative and colorful.
C
They can transmit data quickly.
D
They are small and flexible.
24

Which best describes a difference between laser light and regular light?

A
Laser light is less concentrated.
B
Laser light has a beam that spreads out.
C
Laser light is made of one specific color.
D
Laser light pumps out light particles one at a time.
25

Which best compares a nondigital and a digital camera?

A
A nondigital camera produces images using mirrors, and a digital camera produces them using lenses.
B
A nondigital camera produces a real image, and a digital camera produces a virtual image.
C
A nondigital camera uses a concave lens to capture light, and a digital camera uses a convex lens.
D
A nondigital camera uses film to record images, and a digital camera uses sensors.

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Lesson 5.3 Using Light