Q
Which lines act as normals to a spherical mirror? A. Line joining P and C. B. Line joining C and the point of incidence. C. Line joining F and the point of incidence.
RRB Group-D
18/08/2022 / Shift-III
2022
✓ Answer:
A
Both A and B
A radius to any point of a spherical surface is normal there. PC is the normal at the pole.