Question

Why a ray,directed towards centre of curvature of spherical mirror,retraces its path after reflection.

Answer 1

A ray directed towards centre of the curvature of the spherical mirror retraces its path after reflection because the line joining the pole and center of curvature, i.e principle axis acts as normal to the mirror. And due to law of reflection ,i.e angle of incidence is equal to angle of reflection; the reflected ray makes equal angle with the normal. And as the incident angle is zero, the reflected angle is also zero and the ray of light retraces the same path along the normal.

Answer 2

$\large\underline\bold{ANSWER \red{\huge{\checkmark}}}$

A ray directed towards centre of the curvature of the spherical mirror retraces its path after reflection because the line joining the pole and center of curvature, i.e principle axis acts as normal to the mirror. And due to law of reflection ,i.e angle of incidence is equal to angle of reflection; the reflected ray makes equal angle with the normal. And as the incident angle is zero, the reflected angle is also zero and the ray of light retraces the same path along the normal.