Question a flashlight on the bottom of a 445 m deep, Ask an Expert

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Question: A flashlight on the bottom of a 4.45 m deep swimming pool sends a ray upward and at an angle so that the ray strikes the surface of the water 1.65 m from the point directly above the flashlight.

A- What angle (in air) does the emerging ray make with the water's surface?

If possible just a brief explanation how you got the answer?

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