A ray in air is incident at 60° on a plane-parallel glass slab of thickness 10 cm and refractive index 1.732. Calculate the lateral displacement of the emergent ray.
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A ray in air is incident at 60° on a plane-parallel glass slab of thickness 10 cm and refractive index 1.732. Calculate the lateral displacement of the emergent ray.

G1 Physics · Accepted Answer

Snell's law gives sin r = sin 60°/1.732, so r = 30.00°. Lateral shift d = t sin(i−r)/cos r = 5.77 cm.