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