Chapter 3:
Electromagnetic Waves
Practice Test
1.
What is interference?
a.
the bending of light as it travels from one medium to another medium
b.
the overlapping of two waves to create a new resultant wave
c.
the bending of light around a barrier
d.
the change in direction of a wave as it strikes a surface
Hint
2.
What is the relationship between the frequency and wavelength of an electromagnetic wave?
a.
The product of frequency and wavelength is the speed of the wave.
b.
As frequency increases, wavelength increases.
c.
Frequency and wavelength are indirectly proportional.
d.
All of the above.
Hint
3.
What is an electromagnetic wave?
a.
a wave with electrical and magnetic fields vibrating parallel to one another
b.
As frequency increases, wavelength increases.
c.
Frequency and wavelength are indirectly proportional.
d.
All of the above.
Hint
4.
What is the approximate wavelength of visible light?
a.
5000 m
b.
0.5 m
c.
0.000 000 5 m
d.
0.000 000 000 005 m
Hint
5.
What color coat might you buy if you wanted to stay warm on a cold, sunny winter day?
a.
white
b.
It does not matter what color the coat is.
c.
black
d.
silver
Hint
6.
What term is used for an optical device that has many rows of equally spaced grooves that also produce interference patterns?
a.
diffraction grating
b.
thin film plate
c.
diffraction slit
d.
interference filament
Hint
7.
What is radiation?
a.
certain parts of the electromagnetic spectrum
b.
a combination of electrical and magnetic fields
c.
the diffusion of electromagnetic energy as it encounters a barrier
d.
the transfer of energy by electromagnetic waves
Hint
8.
What is diffraction?
a.
the overlapping of two waves to create a new resultant wave
b.
the bending of light around a barrier
c.
the bending of light as it travels from one medium to another medium
d.
the change in direction of a wave as it strikes a surface
Hint
9.
Why do soap bubbles often appear to show a rainbow of colors?
a.
reflection
b.
the bending of light around a barrier
c.
the bending of light as it travels from one medium to another medium
d.
All of the above.
Hint
10.
What produces the shimmering colors of a morpho butterfly's wing?
a.
thin film interference
b.
a diffraction grating
c.
single slit diffraction
d.
many different pigments
Hint
11.
A microwave oven uses microwaves to cook food. Where in the electromagnetic spectrum are microwaves found?
a.
longer wavelength than visible light.
b.
higher frequency than ultraviolet waves
c.
the same frequency as infrared radiation
d.
shorter wavelength than infrared radiation
Hint
12.
What kind of wave is an electromagnetic wave?
a.
a transverse wave
b.
a shock wave
c.
a longitudinal wave
d.
a combination of longitudinal and transverse waves
Hint
13.
How is the spectrum of a star produced?
a.
The atmosphere of a star acts as diffraction grating.
b.
The gases in the atmosphere of a star absorb a certain wavelength of light.
c.
The atmosphere of a star produces thin film interference.
d.
The gases in the atmosphere of a star radiate a certain wavelength of light.
Hint
14.
An X-ray beam focused on a crystal will produce an interference pattern. What does this suggest about crystals?
a.
Crystals are made of thin films.
b.
Crystals are made of certain elements.
c.
The atmosphere of a star produces thin film interference.
d.
All of the above.
Hint
15.
What kind of radiation is thought to cause cancer in people with a history of sunburn?
a.
ultraviolet A
b.
ultraviolet B
c.
The atmosphere of a star produces thin film interference.
d.
All of the above.
Hint
