Question

The angle of incidence of a light ray on a mirrored surface is 69.2o. What is the angle between the incident and reflected rays?

Answer 1

Given:

The angle of incidence of a light ray on a mirrored surface is

$\angle i=69.2^{\circ}$

Required: Angle between the incident and reflected ray.

Explanation:

The diagram can be drawn as

According to the laws of reflection,

$\angle i=\angle r$

So, the angle between the incident and reflected rays are

$\begin{gathered} \angle i+\angle r=69.2^{\circ}+69.2^{\circ} \\ =138.4^{\circ} \end{gathered}$

The angle between the incident and the reflected ray is 138.4 degrees.

Final Answer: The angle between the incident and the reflected ray is 138.4 degrees.