Light is emitted when
A) electromagnetic waves emanate from matter.
B) atomic nuclei are made to vibrate.
C) high-frequency sound waves strike matter.
D) electron clouds of atoms are forced into oscillation.
Correct Answer:
Verified
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Q16: When light passes through an ordinary window
Q18: The vibrational direction of the electron and
Q19: In optical fibers of uniform density, light
Q21: Refraction results from differences in light's
A) speed.
B)
Q22: Light refracts when traveling from air into
Q23: Refraction causes the bottom of a swimming
Q24: A primary rainbow is brighter than a
Q25: Optical fibers are now used by
A) surgeons.
B)
Q60: Atmospheric refraction tends to make daytimes
A)longer.
B)shorter.
C)no change
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