xercise $33\mathrm{.}16-$ Enhanced $-$ with Feedback

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Review

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Constants

Introduction

A flat piece of glass covers the top of a vertical cylinder that is completely filled with water. If a ray of light traveling in the glass is incident on the interface with the water at an angle of aa $=36\mathrm{.}0,$ the ray refracted into the water makes an angle of $50\mathrm{.}0$ with the normal to the interface.

Part A

What is the smallest value of the incident angle aa for which none of the ray refracts into the water?

Express your answer in degrees.

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