Using Light — Unit test Answers

3 verified answers
1
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Which materials can be used to make fiber optic strands?

A
metal and glass
B
glass and plastic
C
plastic and metal
D
glass and ceramic
2
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The diagram shows parts of a wave.Which is shown by the letter X?

Question illustration
A
trough
B
amplitude
C
crest
D
wavelength
3

Jin has four colorful glass bottles on his windowsill. One is red, one is violet, one is green, and one is yellow. The light that passes through which bottle has the lowest frequency?

A
red
B
violet
C
green
D
yellow
4

An object is placed in front of a plane mirror. The reflected image of the object will be a

A
real image that appears to be behind the mirror.
B
real image that appears to be in front of the mirror.
C
virtual image that appears to be behind the mirror.
D
virtual image that appears to be in front of the mirror.
5

Which correctly lists the four parts of the eye that allow light to pass through them?

A
sclera, cornea, iris, lens
B
cornea, lens, pupil, vitreous humor
C
retina, vitreous humor, sclera, pupil
D
lens, sclera, cornea, vitreous humor
6

Ingrid says that a red ball of clay appears red because the clay reflects red wavelengths. Simon says that the clay appears red because it allows red wavelengths to pass through it.Which statement best explains who is correct?

A
Ingrid is correct. The clay appears red because it reflects red wavelengths.
B
Ingrid is correct. The clay appears red because it is a type of matter.
C
Simon is correct. The clay appears red because it allows red wavelengths to pass through it.
D
Simon is correct. The clay appears red because it is a solid.
7

A doctor uses an instrument(s) that emits light and allows the doctor to view the inside of a patient’s intestine.

A
a telescope
B
a microscope
C
laser beams
D
fiber optics
8

Which color of white light bends the least when it is refracted by a prism?

A
blue
B
yellow
C
green
D
violet
9

The lens in the eyepiece of a reflecting telescope breaks. How will this most affect the function of the telescope?

A
Magnified images will appear upside down.
B
Magnified images will not be created.
C
Light from distant objects will not be captured.
D
Light rays will not be sent to the eyepiece.
10

Leon sees a poster that shows a lake in front of a snow-capped mountain. The mountain appears upside down in the lake.

A
The surface of the lake is smooth.
B
The surface of the lake is transparent.
C
The surface of the lake is polished.
D
The surface of the lake is rough.
11

Which part of the electromagnetic spectrum is nearest to X-rays?

A
microwaves
B
infrared light
C
gamma rays
D
radio waves
12

Donna shines a flashlight and a laser pointer on a sheet of paper. She holds each device at an equal distance from the paper. How does the light hitting the paper from each device appear different?

A
The light from the flashlight lights up a larger area of the paper.
B
The light from the laser pointer lights up a larger area of the paper.
C
The light from the flashlight magnifies a larger area of the paper.
D
The light from the laser pointer magnifies a larger area of the paper.
13

In a farsighted eye, where does the image formed by the lens fall?

A
in front of the retina
B
behind the retina
C
on the blind spot
D
in front of the blind spot
14

The diagram below illustrates the law of reflection. Which is the angle of reflection?

Question illustration
A
A
B
B
C
C
D
D
15

Ben created the table below to identify the roles of different parts of the eye.

Question illustration
A
There is a single type of cone cell.
B
The lens forms a real image.
C
The iris is a hole through which light passes.
D
The retina carries the signals to the brain.

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Using Light — Unit test Answers — Reed Fall 2026…