Question

23. For which value angle of incidence lateral displacement is maximum? Can it be zero?​

Answer 1

Lateral shift for light passing through a rectangular glass slab is maximum for an incidence angle of 90°.

Lateral Displacement can be zero in the following case:

General formula for Lateral Displacement:

$\boxed{ \sf{t = \dfrac{ \sin(i - r) }{ \cos(r) } }}$

t is the lateral Displacement, i is angle of incidence and r is angle of refraction.

Hence , t = 0 , when sin(i - r) = 0 ;

$\therefore \: \sin(i - r) = 0$

$= > i - r = 0$

$\boxed{= > \angle i = \angle r}$

This is possible on in 2 conditions:

• If the angle of refraction is 0°

• The refractive index of glass is equal to the surrounding medium.

Hope It Helps.