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12.2 quiz
Beigesteuert von: Howard
  • 1. An electromagnetic wave is caused by a disturbance in
A) heat
B) the atmosphere
C) a material medium
D) a field
  • 2. Which of the following produce(s) the most EM waves on Earth?
A) the high energy of the Sun
B) the energy of distant stars
C) a vacuum
D) artificial lights
  • 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) depends on the source of the waves
B) always remains constant
C) increases as the amount of energy increases
D) decreases as the waves spread out
  • 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) microwaves
B) x-rays
C) radio waves
D) ultraviolet light
  • 7. These EM waves have the highest energy.
A) x-rays
B) radio waves
C) ultraviolet light
D) gamma rays
  • 8. EM waves with frequencies of 1012 Hz or less are considered this type of wave.
A) microwaves
B) radio waves
C) ultraviolet light
D) x-rays
  • 9. This type of EM wave is frequently associated with heat.
A) microwaves
B) radio waves
C) ultraviolet light
D) infrared light
  • 10. The smallest part of the EM spectrum is made up of this type of wave.
A) ultraviolet light
B) radio waves
C) visible light
D) microwaves
  • 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) ultraviolet light
B) microwaves
C) x-rays
D) radio waves
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