12.2 quiz

Hauen laguntzarekin: Howard

1. An electromagnetic wave is caused by a disturbance in

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

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

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

3. Radiation is the

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

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

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

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

7. These EM waves have the highest energy.

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

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

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

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

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

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

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

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

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