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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) a field
C) the atmosphere
D) heat
  • 2. Which of the following produce(s) the most EM waves on Earth?
A) artificial lights
B) the high energy of the Sun
C) the energy of distant stars
D) a vacuum
  • 3. Radiation is the
A) speed of EM waves in a vacuum
B) energy that moves as EM waves
C) motion of a medium caused by EM waves
D) conversion of EM waves into kinetic energy
  • 4. In a vacuum, the speed of EM waves
A) increases as the amount of energy increases
B) always remains constant
C) depends on the source of the waves
D) decreases as the waves spread out
  • 5. When microwaves encounter water, they
A) are reflected in many directions
B) convert electromagnetic energy into heat
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) x-rays
B) microwaves
C) ultraviolet light
D) radio waves
  • 7. These EM waves have the highest energy.
A) ultraviolet light
B) x-rays
C) radio waves
D) gamma rays
  • 8. EM waves with frequencies of 1012 Hz or less are considered this type of wave.
A) radio waves
B) x-rays
C) ultraviolet light
D) microwaves
  • 9. This type of EM wave is frequently associated with heat.
A) infrared light
B) ultraviolet light
C) radio waves
D) microwaves
  • 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) 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) ultraviolet light
C) radio waves
D) x-rays
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