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12.2 quiz
Συνεισφορά από: Howard
  • 1. An electromagnetic wave is caused by a disturbance in
A) the atmosphere
B) a field
C) heat
D) a material medium
  • 2. Which of the following produce(s) the most EM waves on Earth?
A) artificial lights
B) a vacuum
C) the energy of distant stars
D) the high energy of the Sun
  • 3. Radiation is the
A) motion of a medium caused by EM waves
B) energy that moves as EM waves
C) speed of EM waves in a vacuum
D) conversion of EM waves into kinetic energy
  • 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) are reflected in many directions
B) pass through the water without interacting with it
C) are refracted
D) convert electromagnetic energy into heat
  • 6. EM waves from this part of the spectrum are used in radar and cell phones.
A) ultraviolet light
B) x-rays
C) microwaves
D) radio waves
  • 7. These EM waves have the highest energy.
A) radio waves
B) gamma rays
C) x-rays
D) ultraviolet light
  • 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) microwaves
B) infrared light
C) radio waves
D) ultraviolet light
  • 10. The smallest part of the EM spectrum is made up of this type of wave.
A) visible light
B) ultraviolet light
C) radio waves
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) microwaves
D) radio waves
  • 12. These EM waves pass through soft tissue but are absorbed by bone.
A) radio waves
B) microwaves
C) x-rays
D) ultraviolet light
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