Question

Focal length of a concave mirror is x.the sum of the focal length and radius of curvature of the mirror will be

Answer 1

Answer:

x+2x

Explanation:

length of radius of curvature = 2x

and length of focal length = x so sum of these two will be x+2x

Answer 2

" 3x " is the answer..

EXPLANATION :

Focal length of the concave mirror = x

radius of curvature of the mirror = 2f

= 2x

therefore their sum will be, x+2x = 3x