The critical angle is least in which of the following?
A) glass
B) water
C) diamond
D) vacuum
Correct Answer:
Verified
Q13: Your image in a plane mirror is
A)virtual.
B)real.
C)both
Q19: Light will almost always travel from one
Q20: To see his full height,a boy that
Q21: A single raindrop illuminated by sunshine disperses
A)a
Q22: Optical fibers are now used by
A)surgeons.
B)mechanics.
C)engineers.
D)all of
Q23: When a light beam emerges from water
Q26: Refraction causes the bottom of a swimming
Q27: In optical fibers of uniform density,light actually
A)curves
Q28: When you view a distant rainbow,each single
Q29: The secondary rainbow is dimmer than the
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