Question

state the direction of incident ray which after reflection from spherical mirror retraces it's path ​

Answer 1

If a ray is incident normally on a point on the spherical reflecting surface, the angle of incidence, i = 0 i=0 i=0. ... Therefore, the ray retraces its own path after reflection. And such a ray travels through the centre of curvature of the mirror

Answer 2

Answer:

central on mirror then reflect on the opposite of mirror