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JAMB - Physics (2009 - No. 23)

If the refractive index of crown glass is 1.51, its critical angle is?
48.6°
22.5°
41.5°
45.0°

説明

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

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