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12.2 quiz
Contribució de: Howard
  • 1. An electromagnetic wave is caused by a disturbance in
A) heat
B) a field
C) the atmosphere
D) a material medium
  • 2. Which of the following produce(s) the most EM waves on Earth?
A) the high energy of the Sun
B) a vacuum
C) artificial lights
D) the energy of distant stars
  • 3. Radiation is the
A) conversion of EM waves into kinetic energy
B) speed of EM waves in a vacuum
C) motion of a medium caused by EM waves
D) energy that moves as EM waves
  • 4. In a vacuum, the speed of EM waves
A) increases as the amount of energy increases
B) depends on the source of the waves
C) decreases as the waves spread out
D) always remains constant
  • 5. When microwaves encounter water, they
A) are refracted
B) are reflected in many directions
C) convert electromagnetic energy into heat
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) radio waves
B) ultraviolet light
C) x-rays
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) microwaves
B) radio waves
C) x-rays
D) ultraviolet light
  • 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) ultraviolet light
B) visible light
C) microwaves
D) radio waves
  • 11. Waves from the Sun in this part of the EM spectrum can burn your skin.
A) x-rays
B) microwaves
C) radio waves
D) ultraviolet light
  • 12. These EM waves pass through soft tissue but are absorbed by bone.
A) microwaves
B) radio waves
C) x-rays
D) ultraviolet light
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