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12.2 quiz
Con il contributo di: Howard
  • 1. An electromagnetic wave is caused by a disturbance in
A) the atmosphere
B) heat
C) a field
D) a material medium
  • 2. Which of the following produce(s) the most EM waves on Earth?
A) the energy of distant stars
B) artificial lights
C) the high energy of the Sun
D) a vacuum
  • 3. Radiation is the
A) energy that moves as EM waves
B) conversion of EM waves into kinetic energy
C) speed of EM waves in a vacuum
D) motion of a medium caused by EM waves
  • 4. In a vacuum, the speed of EM waves
A) always remains constant
B) depends on the source of the waves
C) decreases as the waves spread out
D) increases as the amount of energy increases
  • 5. When microwaves encounter water, they
A) are refracted
B) pass through the water without interacting with it
C) are reflected in many directions
D) convert electromagnetic energy into heat
  • 6. EM waves from this part of the spectrum are used in radar and cell phones.
A) radio waves
B) microwaves
C) x-rays
D) ultraviolet light
  • 7. These EM waves have the highest energy.
A) ultraviolet light
B) radio waves
C) x-rays
D) gamma rays
  • 8. EM waves with frequencies of 1012 Hz or less are considered this type of wave.
A) radio waves
B) ultraviolet light
C) x-rays
D) microwaves
  • 9. This type of EM wave is frequently associated with heat.
A) radio waves
B) infrared light
C) ultraviolet light
D) microwaves
  • 10. The smallest part of the EM spectrum is made up of this type of wave.
A) radio waves
B) ultraviolet light
C) visible light
D) microwaves
  • 11. Waves from the Sun in this part of the EM spectrum can burn your skin.
A) microwaves
B) radio waves
C) ultraviolet light
D) x-rays
  • 12. These EM waves pass through soft tissue but are absorbed by bone.
A) x-rays
B) radio waves
C) ultraviolet light
D) microwaves
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