Q. 305.0( 1 Vote )

Light is incident from glass (μ = 1.50) to water (μ = 1.33). Find the range of the angle of deviation for which there are two angles of incidence.

Answer :


Refractive index of glass is


Refractive index of water is


Critical Angle=


According to the question:


There will be two angles of incidence:


(1) When light ray passes through the normal


Angle of incidence =


Angle of refraction=


Angle of deviation =


(2) When light ray incident at critical angle


(As light ray is passing from glass to water)






Angle of deviation=


=


=


If angle of incidence increases beyond critical angle, total internal reflection will occur. So, the range of angle of deviation is


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