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12.2 quiz
Συνεισφορά από: Howard
  • 1. An electromagnetic wave is caused by a disturbance in
A) a field
B) the atmosphere
C) a material medium
D) heat
  • 2. Which of the following produce(s) the most EM waves on Earth?
A) a vacuum
B) the high energy of the Sun
C) artificial lights
D) the energy of distant stars
  • 3. Radiation is the
A) conversion of EM waves into kinetic energy
B) speed of EM waves in a vacuum
C) energy that moves as EM waves
D) motion of a medium caused by EM waves
  • 4. In a vacuum, the speed of EM waves
A) always remains constant
B) decreases as the waves spread out
C) increases as the amount of energy increases
D) depends on the source of the waves
  • 5. When microwaves encounter water, they
A) are refracted
B) pass through the water without interacting with it
C) convert electromagnetic energy into heat
D) are reflected in many directions
  • 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) gamma rays
C) ultraviolet light
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) radio waves
B) ultraviolet light
C) infrared light
D) microwaves
  • 10. The smallest part of the EM spectrum is made up of this type of wave.
A) visible light
B) ultraviolet light
C) microwaves
D) radio waves
  • 11. Waves from the Sun in this part of the EM spectrum can burn your skin.
A) microwaves
B) x-rays
C) radio waves
D) ultraviolet light
  • 12. These EM waves pass through soft tissue but are absorbed by bone.
A) microwaves
B) x-rays
C) radio waves
D) ultraviolet light
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