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If the refractive index of crown glass is 1.51, its critical angle is?

Physics
JAMB 2009

If the refractive index of crown glass is 1.51, its critical angle is?

  • A. 48.6°
  • B. 22.5°
  • C. 41.5°
  • D. 45.0°
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Correct Answer: Option C
Explanation

Sin c = (1)/n
= (1)/1.51 = 0.6622
∴ c = sin-\(^1\) 0.6622 = 41.47

There is an explanation video available below.

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Explanation Video

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