Q5 of 50 Page 43

When the light entering from glass to water, refractive index of water with respect to glass is 0.9.The angle of incidence at the surface separating two media is 26o48’.Find the angle of refraction at the surface.

Take sin 26o48’ = 0.45 approximately.

Refractive index (R.I) of water with respect to glass =

Given;


Angle of incidence (i) = 26o48’


Refractive index of water with respect to glass = 0.9


⇒ 0.9 =


⇒ =


⇒


⇒ r =


⇒ r = 300.


Hence angle of refraction is 300.


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