Question

Find θ if the light is falling on the pole and angle of incidence is ${30}^{\circ }$ as shown in the figure?

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

Principal axis is normal at the pole.

So, ∠i = ${30}^{\circ }$

By law of reflection :-

∠i = ∠r = ${30}^{\circ }$

So ∠θ = ${30}^{\circ }$