An object is placed in front of a right angled prism ABC in two position (a) and (b) as shown in figure. The prism is made of crown glass with critical angle `41^(@)`. Trace the path of two rays P and Q in figure (a) and (b)

Explanation

Angle of incident in each case is `45^(@)` and it is greater than the critical angle so total internal reflection will take place at each surface