Question

A ray incident at the pole P of a spherical mirror after reflection:

Options

• Retraces its original path

• Passes through the principal focus F

• Becomes parallel to the principal axis

• Is reflected according to the laws of reflection and makes equal angles with the principal axis

Answer 1

The principal axis is normal to the mirror at the pole. Therefore a ray incident at the pole is reflected according to the laws of reflection, making equal angles with the principal axis.