12.2 quiz

Hauen laguntzarekin: Howard

1. An electromagnetic wave is caused by a disturbance in

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

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

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

3. Radiation is the

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

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

7. These EM waves have the highest energy.

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

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

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

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

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

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

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

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

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

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

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

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