If the refractive index of crown glass is 1.51, its critical angel is.
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Correct Answer: Option C
Explanation:
Sin c = (1)/n
= (1)/1.51 = 0.6622
∴ c = sin +0.6622 = 41.47
Sin c = (1)/n
= (1)/1.51 = 0.6622
∴ c = sin +0.6622 = 41.47