Which one of the following alternatives is FA | vedclass

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(C) In the position of minimum deviation for a prism,the light ray passes symmetrically through the prism.This implies that the angle of incidence $(i

Vedclass · Accepted Answer

$i_1 = r_1$

Vedclass · Answer

(C) In the position of minimum deviation for a prism,the light ray passes symmetrically through the prism.This implies that the angle of incidence $(i_1)$ is equal to the angle of emergence $(i_2)$,i.e.,$i_1 = i_2$.Consequently,the angle of refraction at the first surface $(r_1)$ is equal to the angle of incidence at the second surface $(r_2)$,i.e.,$r_1 = r_2$.Since $i_1 = i_2$ and $r_1 = r_2$,the condition $i_1 = r_1$ is generally not true unless the refractive index of the prism material is $1$,which is physically impossible for a prism.Therefore,the statement $i_1 = r_1$ is $FALSE$.

Which one of the following alternatives is $FALSE$ for a prism placed in a position of minimum deviation?

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