12.2 quiz - Skyndipróf

Sent inn af: Howard

1. An electromagnetic wave is caused by a disturbance in

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

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

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

3. Radiation is the

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

4. In a vacuum, the speed of EM waves

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

5. When microwaves encounter water, they

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

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

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

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

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

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

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

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

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

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

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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