Chapter 17, Problem 39A

To determine

The angle between the reflected ray and the normal to the mirror.

Answer to Problem 39A

  $38°$

Explanation of Solution

Given:

The angle made by the incident ray with the normal, ${\theta }_i=38°$

Formula used:

For the mirror,

  $\begin{array}{c}\text{angle of incidence = angle of reflection}\\ {\theta }_i={\theta }_r\end{array}$

Calculation:

Then, using the property of mirrors, angle of reflection with the normal will be,

  ${\theta }_r={\theta }_i=38°$

Conclusion:

Hence, the angle between the reflected ray and the normal to the mirror is $38°$ .