Unit Test — Unit test Answers

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1
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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.
2
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What is occurring when two waves traveling along the same medium meet and cancel each other out?

A
destructive interference
B
constructive interference
C
reflection
D
refraction
3

Which statement best describes how waves carry energy?

A
Energy moves from one place to another through the wave.
B
Energy increases as it moves through the wave.
C
Energy is completely consumed by the beginning of the wave.
D
Energy builds through the wave and is released at the end.
4

Which types of waves requires matter to carry energy?

A
electromagnetic waves only
B
mechanical waves only
C
electromagnetic and mechanical waves
D
longitudinal and electromagnetic waves
6

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.
7

Which equation should be used to calculate the speed of a wave?

A
speed = frequency x wavelength
B
speed = frequency x hertz
C
speed = period x wavelength
D
speed = period x hertz
9

Which kinds of lenses are in a light microscope?

A
a concave objective lens and a convex eyepiece lens
B
a convex objective lens and a concave eyepiece lens
C
concave objective and eyepiece lenses
D
convex objective and eyepiece lenses
12

Adam observed properties of four different waves and recorded observations about the frequency and volume of each one in his chart.

Question illustration
A
Only the sound quality of waves Y and Z can be compared.
B
The sound quality of all of the waves can be compared.
C
The sound quality of waves W and X can be compared.
D
The sound quality for these waves cannot be compared.
13

Which best describes how wave intensity and loudness are typically related?

A
Increased intensity means decreased loudness.
B
Increased intensity means increased loudness.
C
Intensity is related to wave amplitude, not loudness.
D
Intensity is related to wave speed, not loudness.
14

A clothing manufacturer uses lasers to cut patterns in fabric when making T-shirts.

A
Laser machinery does not require energy.
B
Laser machinery is safer because its light is weak.
C
Lasers save time by cutting through more layers of fabric.
D
Lasers result in fewer injuries because they quickly become blunt.
15

Green plants need light in order to survive. Structures in the leaves absorb light, which in turn, helps plants make their own food.Under which color of light will plants be least likely to make food?

A
red
B
blue
C
orange
D
green
16

What do diffraction and refraction have in common?

A
They both involve interference.
B
They both involve wave interactions.
C
They both involve reflection.
D
They both involve construction.
17

After the 1600s, how did observations of light being refracted change the way most scientists thought about light?

A
They no longer believed that light acted as waves.
B
They began to believe that light acted as waves.
C
They no longer believed that light acted as particles.
D
They began to believe that light acted as particles.
18

Which example would contain only longitudinal waves?

A
a crowd doing the wave at a sporting event
B
an ultrasound that transmits soundwaves
C
the waves formed by the ocean
D
playing the guitar strings
19

Which part of the electromagnetic spectrum has the longest wavelengths?

A
radio waves
B
gamma rays
C
infrared light
D
ultraviolet light
20

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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