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12.2 quiz
Συνεισφορά από: Howard
  • 1. An electromagnetic wave is caused by a disturbance in
A) a field
B) heat
C) a material medium
D) the atmosphere
  • 2. Which of the following produce(s) the most EM waves on Earth?
A) the energy of distant stars
B) artificial lights
C) a vacuum
D) the high energy of the Sun
  • 3. Radiation is the
A) energy that moves as EM waves
B) conversion of EM waves into kinetic energy
C) motion of a medium caused by EM waves
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) decreases as the waves spread out
D) always remains constant
  • 5. When microwaves encounter water, they
A) pass through the water without interacting with it
B) are reflected in many directions
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) radio waves
B) microwaves
C) ultraviolet light
D) x-rays
  • 9. This type of EM wave is frequently associated with heat.
A) microwaves
B) infrared light
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) microwaves
C) visible light
D) ultraviolet light
  • 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) x-rays
B) microwaves
C) radio waves
D) ultraviolet light
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