12.2 quiz

1. An electromagnetic wave is caused by a disturbance in

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

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

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

3. Radiation is the

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

4. In a vacuum, the speed of EM waves

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

5. When microwaves encounter water, they

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

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

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

7. These EM waves have the highest energy.

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

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

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

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

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

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

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

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

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

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

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

Azok a diákok, akik elvégezték ezt a tesztet, szintén elvégezték :

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