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The refractive index of diamond is 2.42 . What is the critical angle for light passing from diamond to air?
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At this angle, light is refracted along the boundary between the two media. Show more…
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The refractive index of diamond is $2.42 .$ What is the critical angle for light passing from diamond to air? We use $n_{i} \sin \theta_{i}=n_{t} \sin \theta_{t}$ to obtain $$ (2.42) \sin \theta_{c}=(1) \sin 90^{\circ} $$ from which it follows that $\sin \theta_{c}=0.413$ and $\theta_{c}=24.4^{\circ}$.
Take the index of refraction for diamond to be 2.43 and that of air to be 1. What is the critical angle in degrees for light rays going from diamond to air?
Optional. What is the critical angle for a diamond-air boundary? (The index of refraction of diamond is $2.42 .$.______
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