12.2 quiz - Skyndipróf

1. An electromagnetic wave is caused by a disturbance in

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

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

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

3. Radiation is the

A) motion of a medium caused by EM waves
B) conversion of EM waves into kinetic energy
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) always remains constant
B) increases as the amount of energy increases
C) decreases as the waves spread out
D) depends on the source of the waves

5. When microwaves encounter water, they

A) are refracted
B) are reflected in many directions
C) convert electromagnetic energy into heat
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) microwaves
B) x-rays
C) ultraviolet light
D) radio waves

7. These EM waves have the highest energy.

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

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

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

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

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

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

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

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

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

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

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

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