At night, you decide to go for a swim in the apartment complex pool. Your roomma

Question

At night, you decide to go for a swim in the apartment complex pool. Your roommate come to find you. The roommate uses a flashlight and shines it on the pool. You are currently underwater and decide to apply what you learned in class that morning about light rays.

You roughly estimate that the light rays refract in the water at an angle of 41.5°. You know that air has an index of refraction of 1.0. The pool contains water with the index of refraction 1.20. Determine the incident angle of the light ray.

Explanation / Answer

Applying Snell's law,

ni sin(i) = nr sin(r)

1 * sin(i) = 1.20 * sin41.5

sin(i) = 0.795

i = 52.7 deg

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