Rays passing through the principal focus or directed towards the centre of curvature play a crucial role in image formation. They demonstrate the reflective properties of mirrors, leading to the emergence of parallel rays or reflection along the same path, ...

The fact that a ray parallel to the principal axis in a concave mirror, after reflection, passes through the principal focus illustrates the focusing property of concave mirrors. This phenomenon is utilized in understanding image formation.

In a concave mirror, a ray passing through the centre of curvature is reflected back along the same path. Similarly, in a convex mirror, a ray directed in the direction of the centre of curvature is also reflected back along ...

A ray passing through the principal focus of a concave mirror, or directed towards the principal focus of a convex mirror, after reflection, emerges parallel to the principal axis.

In a concave mirror, a ray parallel to the principal axis, after reflection, passes through the principal focus. In contrast, in a convex mirror, the same ray appears to diverge from the principal focus after reflection.