If the refractive index of a medium is V2, what is the critical angle?
-
A.
45o -
B.
50o12′ -
C.
56o25′ -
D.
75o -
E.
90o
Correct Answer: Option A
Explanation
sin C = (frac{1}{n}) ; sin C = (frac{1}{√2})
C = sin-1(frac{1}{√2})
= 45o
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