A ray in air is incident at 45° on a plane-parallel glass slab of thickness 6 cm and refractive index 1.500. Calculate the lateral displacement of the emergent ray.
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A ray in air is incident at 45° on a plane-parallel glass slab of thickness 6 cm and refractive index 1.500. Calculate the lateral displacement of the emergent ray.

G1 Physics · Accepted Answer

Snell's law gives sin r = sin 45°/1.500, so r = 28.13°. Lateral shift d = t sin(i−r)/cos r = 1.97 cm.