12.2 quiz

Hauen laguntzarekin: Howard

1. An electromagnetic wave is caused by a disturbance in

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

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) motion of a medium caused by EM waves
D) conversion of EM waves into kinetic energy

4. In a vacuum, the speed of EM waves

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

5. When microwaves encounter water, they

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

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

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

7. These EM waves have the highest energy.

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

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

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

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

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

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

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

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

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

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

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

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