Question

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

Answer 1

This is because if a tangent is drawn at the point of contact of mirror where the ray passes through the curvature and touches the mirror, then it would be 90 degree since radius of curvature is perpendicular to the tangent hence angle of incidence will coincide with the normal. Therefore angle of reflection will also coincide and hence it passes agin through the centre of curvature.

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Answer 2

so the answer is easy angle of incidence=angle of refraction=0