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Physics Ray Optics JEE (Main) / AIEEE Problems ( Previous Years ) MCQ (Single Correct)

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 90º to the normal.

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

The spectrum of visible light whose frequency is more 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.

Text Solution

Verified by Experts

The correct answer is:

here sin C =

and n water =

If frequency is less ⇒ λ is greater and hence R.I. (n water ) is less and therefore, critical angle increases.

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