Redraw the following diagram on your answer-sheet and show the path of the reflected ray. Also mark the angle of incidence (∠i) and the angle of reflection (∠r) on the diagram.
when a ray of light passes through the focus of a concave mirror then it becomes parallel to the principal axis. Here incident ray AE is passing through the focus F of concave mirror and strikes the mirror at E, then it gets reflected through path EG parallel to the axis.
Also,
Angle of incidence = angle of reflection
∠i = ∠r