A ray of light is incident at an angle ' $\mathrm{i}$ ' on one face of prism of small angle 'A' and emerges…
A ray of light is incident at an angle ' $\mathrm{i}$ ' on one face of prism of small angle 'A' and emerges normally from the other surface. ' $\mu$ ' is the refractive index of the material of the prism. The angle of incidence is
$A \mu$
$\frac{A}{2 \mu}$
$\frac{A \mu}{2}$
$\mu$
Solution
For small angled prism $\delta_{m}=(\mu-1) A$
Again $\quad i+e=A+\delta_{m}=\mu A-A$
Here $\quad e=0 \quad \therefore i=A+\delta_{m}=A+\mu A-A=\mu A$