Q9.1Multiple choice
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
- (a)7.5°.
- (b)5°.
- (c)15°.
- (d)2.5°.