An optic fiber is made of clear plastic with index of refraction of 1.50, surrounded by air. For what angles of incidence ? will light remain within the plastic fiber?
A) ? ? 21.1°
B) ? < 38.3°
C) ? > 38.3°
D) ? < 41.8°
E) ? > 41.8°
E
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Indicate whether the statement is true or false
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A) carbon. B) silicon. C) iron. D) sulfur.
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Fill in the blank(s) with correct word