Everyday SciencePhysics
A light ray will retrace its path after reflection for a spherical mirror when it passes through
focus
vertex
centre of curvature
pole
centre of curvature
If a ray is incident normally on a point on the spherical reflecting surface, the angle of incidence, i=0. So, the angle of refraction, r=0. Therefore, the ray retraces its own path after reflection. And such a ray travels through the centre of curvature of the mirror.
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