A ray of light XY is incident on a spherical mirror as shown in the diagram

A ray of light XY is incident on a spherical mirror as shown in the diagram. Redraw the diagram and mark the normal, angle of incidence and angle of reflection.

The incident ray XY which is parallel to the mirror, after reflection will pass through the focus. This is as shown in the figure below. Here, CY is the normal at the point of incidence.