Question
State the direction of incident ray which after reflection from a spherical mirror gets reflected along its own path. Give a reason.
✓
Answer
A ray passing through THE CENTRE OF CURVATURE is incident normally on the spherical mirror, gets reflected back along its own path.
A ray passing through the centre of curvature.
It is because the ray is normal to the spherical mirror,
Hence $\angle i=0$, i.e., the angle of incidence is $0$
Therefore, the angle of reflection $\angle r=0.$
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