Answers26-27 IC Physics 7614BWave Properties

Wave Properties — Unit test Answers

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A ray diagram shows the ray passing from medium 1 to medium 2. After passing into medium 2, the ray bends away from the normal.

A
reflection with scattering in a medium
B
reflection without scattering in a medium
C
refraction with medium 1 denser than medium 2
D
refraction with medium 1 less dense than medium 2
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Walt made a study chart listing uses for two types of electromagnetic waves.

Question illustration
A
A: Infrared WavesB: X-rays
B
A: MicrowavesB: Ultraviolet Waves
C
A: Ultraviolet WavesB: Gamma Rays
D
A: X-raysB: Radio Waves
3

The diagram shows monochromatic light passing through two openings.

Question illustration
A
constructive interference in which waves cancel each other out
B
constructive interference in which waves strengthen each other
C
destructive interference in which waves cancel each other out
D
destructive interference in which waves strengthen each other
4

Yellow light has a frequency of 5.2 × 1014 Hz and travels at a speed of 3.0 × 108 m/s. What is the wavelength of yellow light, in meters?

A
5.8 × 10–7 m
B
2.2 × 10–6 m
C
1.7 × 106 m
D
8.2 × 1022 m
5

A patient is receiving treatments for brain cancer. Which electromagnetic waves are most likely being used as part of the treatment?

A
infrared
B
ultraviolet
C
microwave
D
gamma ray
6

Which is an everyday example of a diffraction grating?

A
A picture of the bottom of a CD or DVD showing rainbow lies going out from the center.
Option A
B
A picture of an upright mirror.
Option B
C
A picture of wave peaks in water.
Option C
D
A picture of bubbles.
Option D
7

Which lists the waves in order of wavelength, from longest to shortest?

A
X-rays, infrared, radio waves
B
infrared, visible light, gamma rays
C
ultraviolet, microwaves, visible light
D
radio waves, gamma rays, visible light
8

Sawyer is studying diffraction. He draws a diagram of a plane wave to show how light waves travel.

Question illustration
A
The wave fronts should be perpendicular to the direction in which the waves move.
B
The arrow showing the direction of movement of the waves should be pointing to the left.
C
The arrow showing the direction of movement of the waves should be pointing downward.
D
The wave fronts should be both parallel and perpendicular to the direction in which the waves move.
9

A light with a second-order bright band forms a diffraction angle of 30.0°. The diffraction grating has 250.0 lines per mm.What is the wavelength of the light?

A
800 nm
B
1,000 nm
C
1,386 nm
D
1,732 nm
10

Arnold makes a chart to summarize what happens when light interacts with matter and is reflected.Which idea does Arnold need to correct?

Question illustration
A
In specular reflection, reflected rays move in the same direction.
B
In scattering, light strikes particles in the atmosphere.
C
In diffuse reflection, reflected rays move in different directions.
D
In scattering, long wavelengths are scattered the most.
11

An incident ray of light strikes a diamond at an angle of 45°. The index of refraction of air is 1.0003 and the index of refraction of a diamond is 2.42.

A
2°
B
17°
C
19°
D
45°
12

What does the index of refraction directly measure?

A
the angle between the incident ray and the normal line
B
the angle between the refracted ray and the normal line
C
the bending of light in a medium
D
the reflection of light in a medium

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