Question

A ray of light is incident at an angle of incidence, i,
on one face of a prism of angle A (assumed to be
small) and emerges normally from the opposite
face. If the refractive index of the prism is u, the
angle of incidence i, is nearly equal to :​

Answer 1

Answer:

Correct option is

C

μA

   α=180  

0

−90  

0

−A=90−A

   r=90−α=A

from snell's law

     μ  

1

​

sini=μ  

2

​

sinr

     1sini=μsinA

for small angle

     

i=μA

​

Explanation: