A spotlight at the bottom of a pool emits a cone of light, Ask an Expert

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A spotlight at the bottom of a pool emits a cone of light upward 22 degrees wide. n= 1.33

1. How wide (as angle w) is the cone of ligh outside of the pool?

2. Suppose the cone of light in the water can be made larger han 22 degrees. What is the maximum angular width before some light is totally reflected back into the water?

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