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

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

The spectrum of visible 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 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.

answer is B.

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Detailed Solution

As frequency of visible light increases refractive index increases. With the increase of refractive index critical angle decreases. So that light having frequency greater than green will get total internal reflection and the light having frequency less than green will pass to air.

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