Physics
JAMB 1982
If the refractive index of a medium is V2, what is the critical angle?
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A.
45o
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B.
50o12'
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C.
56o25'
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D.
75o
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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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