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# Critical angle of glass is  θ1 and the critical angle of water is θ2. Calculate the critical angle for water and glass surface. (μg = 3/2, μw = 4/3)

112 Points
10 years ago

Dear kaushik

The critical angle is the angle of incidence above which total internal reflection occurs. The angle of incidence is measured with respect to the normal at the refractive boundary. The critical angle θc is given by:

$\theta_c = \arcsin \left( \frac{n_2}{n_1} \right),$
critical angle = arcsin(4/3 / 3/2) = 62.73 degres

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Kaushik Ram
33 Points
10 years ago

Dear me The critical angle is the angle of incidence above which total internal reflection occurs. The angle of incidence is measured with respect to the normal at the refractive boundary. The critical angle θc is given by: critical angle = arcsin(4/3 / 3/2) = 62.73 degres