Question

17.why does a Ray of light passing through the

centre of curvature of a concave mirror is reflected

back along the same path after reflection?​

Answer 1

Answer:

A ray of light passing through the centre of curvature of a concave mirror retraces its path (gets reflected along the same path), because as the ray of light passes through centre of curvature of a concave mirror it strikes the mirror along the normal i.e. it incidences on to the mirror at 90 degree.

As with concave mirrors, a ray incident on the mirror with an angle of incidence of zero (through the centre of curvature) will reflect in the opposite direction with zero angle of reflection. The virtual ray extrapolated from the incident ray will pass through the centre of curvature.

The reason why light falling on the center of curvature gets reflected back along the same path is because the angle of incidence and the angle of reflection are along the normal for a concave mirror.