Question

A girl flashed light from a source on a mirror as shown in the picture given below. Draw a ray diagram to show the direction of reflected ray from the mirror.

Answer 1

refer to the attachment^

Answer 2

The mirror shown is plane mirror, and reflected ray will obey laws of refection. Illustration is shown below.

Explanation:

Consider the ray diagram below:

• $PQ$ is the normal drawn at the point of incidence.
• Incident ray from the source makes an angle $x$ with the normal $PQ$.
• According to law of reflection:
• When a light is incident on a polished surface or mirror, the ray bounces back making the same angle with normal as the incident ray makes with the normal.
• The ray that bounces back is called reflected ray and the ray coming from the source is he incident ray,
• So, angle of incidence is equal to the angle is reflection.
• In the diagram shown below, the reflected ray will make angle $y$ with the normal such that $x=y$.
• So, it falls somewhere in between $R$ and $S$.