Ncert Exercises & Solutions

A ray of light incident at an angle $θ$ on a refracting face of a prism emerges from the other face normally. If the angle of the prism is 5 $°$ and the prism is made of a material of refractive index 1.5, the angle of incidence is:

1. 7.5 $°$
2. 5 $°$
3. 15 $°$
4. 2.5 $°$