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