Question

A minor is inclined at an angle of $\theta$ with the horizontal. If ray of right is inclined at an angle $\theta$, then the triangle made by reflected ray with the horizontal is:

• A. $\theta$
• B. $2\theta$
• C. $\frac{\theta }{2}$
• D. None

Answer 1

The correct option is A $\theta$

$\begin{array}{c}\angle ACN=90-\theta \\ \angle NCB=90-\theta bylawsofreplection\left(i=r\right)\\ So,\angle BCD=90-\theta \left(90-\theta \right)=\theta \\ Hence,thereflectedrayCBmeetszeroanglewiththehorizontal.\end{array}$

Hence, option $A$ is the correct answer.