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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) a material medium
D) the atmosphere
  • 2. Which of the following produce(s) the most EM waves on Earth?
A) the high energy of the Sun
B) the energy of distant stars
C) a vacuum
D) artificial lights
  • 3. Radiation is the
A) speed of EM waves in a vacuum
B) motion of a medium caused by EM waves
C) energy that moves as EM waves
D) conversion of EM waves into kinetic energy
  • 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) increases as the amount of energy increases
D) always remains constant
  • 5. When microwaves encounter water, they
A) are reflected in many directions
B) convert electromagnetic energy into heat
C) pass through the water without interacting with it
D) are refracted
  • 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) gamma rays
B) ultraviolet light
C) radio waves
D) x-rays
  • 8. EM waves with frequencies of 1012 Hz or less are considered this type of wave.
A) x-rays
B) ultraviolet light
C) radio waves
D) microwaves
  • 9. This type of EM wave is frequently associated with heat.
A) radio waves
B) infrared light
C) ultraviolet light
D) microwaves
  • 10. The smallest part of the EM spectrum is made up of this type of wave.
A) radio waves
B) visible light
C) ultraviolet light
D) microwaves
  • 11. Waves from the Sun in this part of the EM spectrum can burn your skin.
A) microwaves
B) ultraviolet light
C) x-rays
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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