Question

for refraction through media in contact with each other show that n31= n21×n32​

Answer 1

Answer:

We know , n12=n1n2        according to Snell's Law

Now, n23=n2n3

 And n31=n3n1

Now , n12×n23×n31=n1n2×n2n3×n3n1=1

Explanation:

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