Question

A ray `PQ` incident normally on the refracting face `BA` is refracted in the prism `BAC` made of material of refractive index `1.5`. Complete the path ray through the prism. From which face will the ray emerge ? Justify your answer.

Answer 1

From the figure `/_A=30^(@)`
`/_QMN=30^(@)=` angle of incidence.
Now, `mu=(1)/(sinC)impliessinC=(1)/(mu)=(1)/(1.5)=(2)/(3)`
Also, `sin i= sin 30^(@)=(1)/(2)`
So, `C gt i` ltbtgt `implies i lt C`