Question

Find $\theta$ if the light is falling on the pole?

Answer 1

Given:
angle of incidence $\angle i=\angle \theta ={30}^{\circ }$
By the law of reflection:-
angle of incidence = angle of reflection
$\angle i=\angle r=$ ${30}^{\circ }$
So $\angle r=\angle \theta$ = ${30}^{\circ }$