Question

for a light refracted by a prism show that the angle deviation​

Answer 1

Refer the attachment!!

The above fig. shows the angle deviation produced by a prism.

Explanation:-

• PQ is the incident ray.
• $\rm \delta_1 \: is \: first \: deviation.$
• QR is the refracted ray inside the prism.
• QR gets for the deviated.
• $\rm \delta_2 \: is \: second \: deviation.$
• RS is the emergent ray outside the prism.
• $\rm \delta \: is \: the \: angle \: between \: RS \: and \: PL.$

Therefore,

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \boxed{ \rm \green {\delta = \delta_1 + \delta_2}}$