A glass surface n 165 has a layer of water n 133 on it


Question: A glass surface (n = 1.65) has a layer of water (n = 1.33) on it. Light in the glass is incident on the glass-water interface.

Question 1: Find the critical angle for total internal reflection.

I want help to calculate the critical angle for total internal reflection.

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Physics: A glass surface n 165 has a layer of water n 133 on it
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