A ray of light is incident at an angle of incidence 60° on the glass slab of refractive index √3. After refraction, the light ray emerges out from other parallel faces and lateral shift between incident ray and emergent ray is 4√3 cm. The thickness of the glass slab is cm.

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Accepted Answer

12. sin r = (sin 60°)/(√3) = 1/2, r = 30°. Shift = (t sin(i-r))/(cos r) = (t sin 30°)/(cos 30°) = t/(√3). t/(√3) = 4√3, so t = 12 cm. → 12

A ray of light is incident at an angle of incidence 60° on the glass slab of refractive index √3. After refraction, the light ray emerges out from other parallel faces and lateral shift between incident ray and emergent ray is 4√3 cm. The thickness of the glass slab is ______ cm.

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