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12.2 quiz
Con il contributo di: Howard
  • 1. An electromagnetic wave is caused by a disturbance in
A) heat
B) a field
C) a material medium
D) the atmosphere
  • 2. Which of the following produce(s) the most EM waves on Earth?
A) artificial lights
B) the energy of distant stars
C) a vacuum
D) the high energy of the Sun
  • 3. Radiation is the
A) motion of a medium caused by EM waves
B) conversion of EM waves into kinetic energy
C) speed of EM waves in a vacuum
D) energy that moves as EM waves
  • 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) are reflected in many directions
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) ultraviolet light
C) radio waves
D) microwaves
  • 7. These EM waves have the highest energy.
A) radio waves
B) x-rays
C) ultraviolet light
D) gamma rays
  • 8. EM waves with frequencies of 1012 Hz or less are considered this type of wave.
A) ultraviolet light
B) microwaves
C) x-rays
D) radio waves
  • 9. This type of EM wave is frequently associated with heat.
A) infrared light
B) radio waves
C) ultraviolet light
D) microwaves
  • 10. The smallest part of the EM spectrum is made up of this type of wave.
A) microwaves
B) radio waves
C) visible light
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) microwaves
D) x-rays
  • 12. These EM waves pass through soft tissue but are absorbed by bone.
A) ultraviolet light
B) x-rays
C) microwaves
D) radio waves
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