Question

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

• A. ${60}^{\circ }$
• B. ${30}^{\circ }$
• C. ${90}^{\circ }$
• D. ${150}^{\circ }$

Answer 1

The correct option is B

${30}^{\circ }$

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 $\angle r=\angle \theta$ = ${30}^{\circ }$