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12.2 quiz
Contribué par: Howard
  • 1. An electromagnetic wave is caused by a disturbance in
A) a material medium
B) the atmosphere
C) a field
D) heat
  • 2. Which of the following produce(s) the most EM waves on Earth?
A) a vacuum
B) artificial lights
C) the high energy of the Sun
D) the energy of distant stars
  • 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) always remains constant
B) increases as the amount of energy increases
C) depends on the source of the waves
D) decreases as the waves spread out
  • 5. When microwaves encounter water, they
A) convert electromagnetic energy into heat
B) are refracted
C) pass through the water without interacting with it
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) ultraviolet light
C) x-rays
D) radio waves
  • 7. These EM waves have the highest energy.
A) gamma rays
B) x-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) ultraviolet light
C) microwaves
D) x-rays
  • 9. This type of EM wave is frequently associated with heat.
A) radio waves
B) microwaves
C) infrared light
D) ultraviolet light
  • 10. The smallest part of the EM spectrum is made up of this type of wave.
A) visible light
B) radio waves
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) radio waves
C) x-rays
D) microwaves
  • 12. These EM waves pass through soft tissue but are absorbed by bone.
A) microwaves
B) radio waves
C) ultraviolet light
D) x-rays
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