 Electromagnetic Waves
2 years ago
mbarnardfhs
Save
Edit
Host a game
Live GameLive
Homework
Solo Practice
Practice 20 QuestionsShow answers
• Question 1
30 seconds
Q.

Electromagnetic waves vary in

the speed they travel in a vacuum.

wavelength and frequency.

the way they reflect.

the orientation of their electric and magnetic fields.

• Question 2
30 seconds
Q.

To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its

wavelength.

intensity.

refraction.

amplitude.

• Question 3
30 seconds
Q.

An electromagnetic wave in a vacuum has a wavelength of 0.07m. What is its frequency?

f= 3.0x 10^8 m/s

f= 3.0x 10^9Hz

f=4.3x 10^9Hz

f=4.3x 10^8m/s

• Question 4
30 seconds
Q.

Light acts like

a wave.

a particle.

Both a wave and a particle

neither a wave nor a particle.

• Question 5
30 seconds
Q.

Which of the following occurs as light travels farther from its source?

Far from the source, photons come together in a small area.

The intensity of light increases as photons move away from the source.

The source gives off less light as photons move away from it.

Far from the source, photons spread over a larger area.

• Question 6
30 seconds
Q.

Infrared rays have a shorter wavelength than

Ultraviolet ray.

X-rays.

gamma rays

• Question 7
30 seconds
Q.

The full range of frequencies of electromagnetic radiation is called

visible light.

the electromagnetic spectrum.

• Question 8
30 seconds
Q.

The waves with the longest wavelengths in the electromagnetic spectrum are

Infrared rays.

gamma rays

X-rays

• Question 9
30 seconds
Q.

The visible light spectrum ranges between

television waves and infrared rays.

infrared rays and ultraviolet rays.

ultraviolet rays and gamma rays.

• Question 10
30 seconds
Q.

X-ray photographs show softer tissue

as invisible.

as dark, highly exposed areas.

the same as dense bones.

as bright white areas.

• Question 11
30 seconds
Q.

Which of the following occurs as a light wave bends when it passes from one medium into another?

constructive interference

refraction

destructive interference

reflection

• Question 12
30 seconds
Q.

Newton’s prism experiments showed that white sunlight is made up of

the full electromagnetic spectrum.

only blue light.

all the colors of the visible spectrum.

only the longest wavelengths.

• Question 13
30 seconds
Q.

Cellular telephones utilize

very high frequency waves.

very low frequency waves.

microwaves.

• Question 14
30 seconds
Q.

When the absorption lines of a galaxy shift toward the blue end of the spectrum, it means that the galaxy is

moving away from Earth

small and young

moving closer to Earth

large and old

• Question 15
30 seconds
Q.

The big bang theory explains the

origin of the universe.

life cycle of a star.

Doppler effect.

arrangement of constellations.

• Question 16
30 seconds
Q.

Which of the following provides support for the big bang theory?

red shift

elliptical galaxies

both (a) and (b)

• Question 17
30 seconds
Q.

Light in the form of a particle that has discrete amount of energy is called a

Charm

Photon

Exciton

Muon

• Question 18
60 seconds
Q.

A communications satellite transmits a radio wave at a frequency of 5.0 x 109 Hz. What is the signal’s wavelength? Assume the wave travels in a vacuum.

(5.0 x 10^9 Hz) x (3.0 x 10^8 m/s)

(5.0 x 10^9 Hz) / (3.0 x 10^8 m/s)

(3.0 x 10^8 m/s) / (5.0 x 10^9 Hz)

(5.0 x 10^9 Hz) + (3.0 x 10^8 m/s)

• Question 19
30 seconds
Q.

What is the electromagnetic spectrum?

The full range of wave frequencies of electromagnetic radiation is called the electromagnetic spectrum.

The rainbow

• Question 20
30 seconds
Q.

Which is an example of a radio wave