12.2 quiz

1. An electromagnetic wave is caused by a disturbance in

A) a material medium
B) heat
C) a field
D) the atmosphere

2. Which of the following produce(s) the most EM waves on Earth?

A) the energy of distant stars
B) a vacuum
C) artificial lights
D) the high energy of the Sun

3. Radiation is the

A) conversion of EM waves into kinetic energy
B) motion of a medium caused by EM waves
C) energy that moves as EM waves
D) speed of EM waves in a vacuum

4. In a vacuum, the speed of EM waves

A) depends on the source of the waves
B) always remains constant
C) decreases as the waves spread out
D) increases as the amount of energy increases

5. When microwaves encounter water, they

A) convert electromagnetic energy into heat
B) are reflected in many directions
C) are refracted
D) pass through the water without interacting with it

6. EM waves from this part of the spectrum are used in radar and cell phones.

A) x-rays
B) microwaves
C) radio waves
D) ultraviolet light

7. These EM waves have the highest energy.

A) gamma rays
B) ultraviolet light
C) radio waves
D) x-rays

8. EM waves with frequencies of 1012 Hz or less are considered this type of wave.

A) ultraviolet light
B) microwaves
C) x-rays
D) radio waves

9. This type of EM wave is frequently associated with heat.

A) microwaves
B) infrared light
C) radio waves
D) ultraviolet light

10. The smallest part of the EM spectrum is made up of this type of wave.

A) visible light
B) microwaves
C) radio waves
D) ultraviolet light

11. Waves from the Sun in this part of the EM spectrum can burn your skin.

A) radio waves
B) x-rays
C) ultraviolet light
D) microwaves

12. These EM waves pass through soft tissue but are absorbed by bone.

A) x-rays
B) ultraviolet light
C) microwaves
D) radio waves

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