Question

Assertion : A ray passing through the centre of curvature hits the concave spherical mirror and retraces it's path

      Reason : A ray passing through the centre of curvature and point of incidence behaves like normal 
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Answer 1

Answer:

The reason for light falling on the centre of curvature gets reflected back along the same path is due to the angle of incidence and the angle of reflection lie along the normal for a concave mirror. ... Hence, the angle of reflection tends to zero degree, thus the ray of light retraces its path.