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12.2 quiz
Prispevano od: 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) the high energy of the Sun
B) a vacuum
C) artificial lights
D) the energy of distant stars
  • 3. Radiation is the
A) conversion of EM waves into kinetic energy
B) energy that moves as EM waves
C) speed of EM waves in a vacuum
D) motion of a medium caused by EM waves
  • 4. In a vacuum, the speed of EM waves
A) decreases as the waves spread out
B) increases as the amount of energy increases
C) always remains constant
D) depends on the source of the waves
  • 5. When microwaves encounter water, they
A) convert electromagnetic energy into heat
B) are reflected in many directions
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) ultraviolet light
B) radio waves
C) gamma rays
D) x-rays
  • 8. EM waves with frequencies of 1012 Hz or less are considered this type of wave.
A) x-rays
B) radio waves
C) microwaves
D) ultraviolet light
  • 9. This type of EM wave is frequently associated with heat.
A) infrared light
B) microwaves
C) ultraviolet light
D) radio waves
  • 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) ultraviolet light
B) x-rays
C) radio waves
D) microwaves
  • 12. These EM waves pass through soft tissue but are absorbed by bone.
A) microwaves
B) radio waves
C) x-rays
D) ultraviolet light
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