Question

1.
If distance between centre of curvature and focus of a
spherical mirror is X m, find the distance between focus
and pole of the mirror.
A. Xm
B. X2 m
C. 2X m
D. X/4 m​

Answer 1

distance between them is Xm

Answer 2

The Distance between focus and pole would be X m.

1) The distance between Center of Curvature and Pole of Mirror is called the radius of Curvature(r).

2) The distance between Focus and Pole of mirror is called its focal length(f).

3) By convention r = 2*f.

4) Hence, the Distance between focus and pole or focal length would be equal to the centre of curvature and focus of mirror.

5) Hence, the length is also X m.