BER'S MATH PROBLEM: The Refractive Index of Water

willydavidjr
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Let n denote the refractive index of water. What fraction of the speed of the light in air is the speed of underwater light? Let \theta denote the critical angle for light going from water to air. Find the value of sin \theta.
 
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willydavidjr said:
Let n denote the refractive index of water. What fraction of the speed of the light in air is the speed of underwater light? Let \theta denote the critical angle for light going from water to air. Find the value of sin \theta.
I suggest that you look up Snell's law.

AM
 
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