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