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April 19, 2015

Homework Help: Physics ~ Please help

Posted by cr on Thursday, April 28, 2011 at 10:27pm.

The index of refraction of a transparent liquid
(similar to water but with a different index of refraction) is 1.39. A flashlight held under the
transparent liquid shines out of the transparent liquid in a swimming pool. This beam of light exiting the surface of the transparent liquid makes an angle of a = 39 degrees with respect
to the vertical.

At what angle (with respect to the vertical)is the flashlight being held under transparent liquid?
Answer in units of degrees.

The flashlight is slowly turned away from the vertical direction.
At what angle will the beam no longer be visible above the surface of the pool? Answer in units of degrees.

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