Center of MassHard

Question

A rectangular glass slab ABCD, of refractive index n1, is immersed in water of refractive index n2 (n1 > n2). A ray of light is incident at the surface AB of the slab as shown. The maximum value of the angle of incidence amax such that the ray comes out only from the other surface CD is given by

Options

A.sin-1
B.sin-1
C.
D.sin-1

Solution


Using snells law
n2sin α = n1 sin(90 - θC)
in α = cos θC
α = sin-1

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