JEE Main 2014 Physics question

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

(A)The spectrum of visible light whose frequency is less than that of green light will come out to the air mediumCorrect
(B)The spectrum of visible light whose frequency is more than that of green light will come out to the air medium
(C)The entire spectrum of visible light will come out of the water at various angles to the normal
(D)The entire spectrum of visible light will come out of the water at an angle of 90° to the normal

Answer: (A)

Solution

and (Cauchy) decreases as frequency decreases. Light of lower frequency than green has a larger critical angle than , so at incidence it

Create a free account to read the complete working, and practise questions like this in a timed test.

Question ID VK-008734