AnswersCrowley Credit Recovery Physics BWave Interactions

Electromagnetic Waves Answers

18 verified answers2 views
1
Free Preview

Which is the correct formula for finding the frequency of an electromagnetic wave?

A
f = c –
Option A
B
f =
Option B
C
f = + c
Option C
D
f =
Option D
2
Free Preview

Which best describes electromagnetic waves moving from gamma rays to radio waves along the electromagnetic spectrum?

A
Wavelength and frequency decrease.
B
Wavelength and frequency increase.
C
Wavelength increases, and frequency decreases.
D
Wavelength decreases, and frequency increases.
3

Frank and Lisa are analyzing the chart, which shows the speed at which light travels through different media.Frank says that light travels through diamond with the greatest frequency. Lisa says that light travels through air with the greatest frequency.

Question illustration
A
Frank is correct because light travels through diamond at the slowest speed, and speed and frequency have an inverse relationship.
B
Lisa is correct because light travels through air at the fastest speed, and speed and frequency have a direct relationship.
C
Neither person is correct because light does not change frequency when it travels through different media.
D
Both people are correct because light has both an inverse and a direct relationship with frequency, depending on the media.
4

The diagram shows changing wavelengths along the electromagnetic spectrum.

Question illustration
A
Y: UltravioletZ: Radio
B
Y: Gamma raysZ: Visible light
C
Y: X-raysZ: Infrared
D
Y: RadioZ: Gamma rays
5

Which best describes electromagnetic waves moving from gamma rays to radio waves along the electromagnetic spectrum?

A
Wavelength and frequency decrease.
B
Wavelength and frequency decrease.
C
Wavelength and frequency increase.
D
Wavelength and frequency increase.
E
Wavelength increases, and frequency decreases.
F
Wavelength increases, and frequency decreases.
G
Wavelength decreases, and frequency increases.
H
Wavelength decreases, and frequency increases.
6

The chart shows the speed at which light travels through different media.

Question illustration
A
water
B
air
C
glass
D
diamond
7

Which two electromagnetic waves are useful for diagnosing illnesses?

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

An ultraviolet wave traveling through a vacuum has a wavelength of 4.0 × 10–7 m. The wave’s frequency, written in scientific notation to two significant figures, is × 1014 Hz.

Answer not available
9

Which lists the waves in order of frequency, from highest to lowest?

A
X-rays, gamma rays, ultraviolet
B
radio waves, visible light, X-rays
C
ultraviolet, microwaves, gamma rays
D
visible light, infrared, microwaves
10

What do all electromagnetic waves have in common?

A
They can travel at the speed of light.
B
They have the same wavelengths.
C
They travel only through matter.
D
They have nonmoving magnetic fields.
11

Radio stations use electromagnetic waves for broadcasting. The chart shows different frequencies of waves used by radio stations.

Question illustration
A
W
B
X
C
Y
D
Z
12

Isla made a diagram to compare X-rays and radio waves.What should Isla write in the areas marked A, B, and C?

Question illustration
A
A: Has a longer wavelength B: Can travel only through matterC: Has a higher frequency
B
A: Has a higher frequencyB: Can travel only through matterC: Has a longer wavelength
C
A: Has a higher frequencyB: Travels at the same speedC: Has a longer wavelength
D
A: Has a longer wavelength B: Travels at the same speedC: Has a higher frequency
13

is a process that modifies light waves so they vibrate in a single plane.

Answer:

Polarization

14

"5.9"

Answer:

102083

15

A cell phone company relies on which kind of waves in order to provide service for its customers?

A
ultraviolet waves
B
infrared waves
C
gamma rays
D
microwaves
16

As the frequency of electromagnetic waves increases, what happens to the wavelength?

A
It increases.
B
It decreases.
C
It fluctuates.
D
It remains constant.
17

What do all electromagnetic waves have in common?

A
They can travel at the speed of light.
B
They have the same wavelengths.
C
They travel only through matter.
D
They have nonmoving magnetic fields.
18

Wave Y and wave Z are two types of electromagnetic waves traveling through a vacuum. Suppose the frequency of wave Y is about three times greater than the frequency of wave Z.

A
It is the same for each wave because the amount of energy transferred is constant in all types of electromagnetic waves.
B
Wave Y transfers about one-third the amount of energy as wave Z because energy and frequency have an inverse relationship.
C
Wave Y transfers about three times the amount of energy as wave Z because energy and frequency have a direct relationship.
D
It is zero for each wave because when waves travel through a vacuum, they do not transfer energy.
19

Which describes the relationship between the frequency, wavelength, and speed of a wave as the wave travels through different media?

A
As speed changes, wavelength changes and frequency remains constant.
B
As speed changes, frequency changes and wavelength remains constant.
C
As speed changes, wavelength and frequency change.
D
As speed changes, wavelength and frequency remain constant.
20

The diagram shows changing wavelengths along the electromagnetic spectrum.

Question illustration
A
Y: UltravioletZ: Radio
B
Y: Gamma raysZ: Visible light
C
Y: X-raysZ: Infrared
D
Y: RadioZ: Gamma rays

Did you find these answers helpful?

More from this Course

Quiz
19 verified answers

Wave Interactions

Quiz
17 verified answers

Sound Waves

Quiz
16 verified answers

Diffraction