Question

the principal focus lies at _____ distance from pole of the mirror​

Answer 1

principal focus is the line crossing parallel to the light ray coming from it

hope it helps you

Answer 2

Answer:

here your answer

Explanation:

there is a relationship between the radius and curvature R, and focus length f of a spherical mirror and is given by R =2f which means that

the principal focus of a spherical mirror lies midway between the pole and center of cultivation

i hope it will help you