Engineering
Physics
Total Internal Reflection
Question

A green light is incident from the water to the air-water interface at the critical angle (θ). Select the correct statement.

The entire spectrum of visible light will come out of the water at an angle of 90° to the normal.

The spectrum of visible light whose frequency is more than that of green light will come out to the air medium.

The spectrum of visible light whose frequency is less than that of green light will come out to the air medium.

The entire spectrum of visible light will come out of the water at various angles to the normal.

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Solution

(Assuming incident light is white)

µv > µR

qv < qR

Note:    The question is wrong because green light will not give any spectrum. Answer is given assuming incident light to be white.