Question

Explain why a ray of light passing through the centre of curvature of concave minor gets reflected along the same path.​

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.

Answer 2

As we already know,

Angle of Incidence = Angle of Reflection, i.e ∠i = ∠r

Here, the angle made by them is along with the normal ray.

In the case of a ray of light passing through the center of curvature, the light ray follows the path along the normal ray. Therefore, the angle of incidence is equal to 0°. Hence, the angle of Reflection is also 0°.

This is why there is no deviation in the light ray and it gets reflected along the same path and retraces it.