ThatQuiz ספריית תרגולים פתור תרגול זה עכשיו
12.2 quiz
נתרם על ידי: 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 high energy of the Sun
B) artificial lights
C) a vacuum
D) the energy of distant stars
  • 3. Radiation is the
A) conversion of EM waves into kinetic energy
B) energy that moves as EM waves
C) speed of EM waves in a vacuum
D) motion of a medium caused by EM waves
  • 4. In a vacuum, the speed of EM waves
A) depends on the source of the waves
B) increases as the amount of energy increases
C) always remains constant
D) decreases as the waves spread out
  • 5. When microwaves encounter water, they
A) pass through the water without interacting with it
B) convert electromagnetic energy into heat
C) are refracted
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) microwaves
C) ultraviolet light
D) radio waves
  • 7. These EM waves have the highest energy.
A) ultraviolet light
B) gamma rays
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) infrared light
B) microwaves
C) radio waves
D) ultraviolet light
  • 10. The smallest part of the EM spectrum is made up of this type of wave.
A) microwaves
B) ultraviolet light
C) visible light
D) radio waves
  • 11. Waves from the Sun in this part of the EM spectrum can burn your skin.
A) radio waves
B) microwaves
C) ultraviolet light
D) x-rays
  • 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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