A Light Ray Enters a Glass Enclosed Fish Tank

question 129

Short Answer

A light ray enters a glass enclosed fish tank. From air it enters the glass at 20° with respect
to the plane of the surface and then emerges into the water. The index for the glass is 1.50
and for water 1.33.
(a) What is the angle of refraction in the glass?
(b) What is the angle of refraction in the water?
(c) Is there any incident angle in air for which the ray will not enter the water due to total
internal reflection? If so, find it.

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Definitions:

Ohms

The standard unit of electrical resistance in the International System of Units (SI), symbolizing the resistance between two points of a conductor.

Amps

A unit of electric current in the International System of Units (SI), short for amperes.

Volts

Volts are the unit of electric potential and electric potential difference in the International System of Units (SI), indicating the force that drives electric current between two points.

Parallel Circuit

In electricity, any circuit that has two or more paths for current flow.