JEE Main | 2014Geometrical OpticsHard
Question
A green light is incident from the water to the air - water interface at the critical angle(θ). Select the correct statement
Options
A.The entire spectrum of visible light will come out of the water at an angle of 90o to the normal
B.The spectrum of visible light whose frequency is less than that of green light will come out to the air medium
C.The spectrum of visible light whose frequency is more than that of green light will come out to the air medium
D.The entire spectrum of visible light will come out of the water at various angles to the normal
Solution
sin θc
For greater wavelength (i.e. lesser frequency) μ is less So, θc would be more. So, they will not suffer reflection and come out at angles less then 90o.
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