Question

Focal length of a concave mirror is 3 . Find the sum of the focal length and radius of curvature of a concave mirror.​

Answer 1

Answer:

9 m

Explanation:

If the unit is meter then,

focal length = 3 m

now,  radius = r = 2 x f ( focal length)

                         = 2 x 3

                         = 6 m

Now,

The sum of the focal length and radius of curvature = 3 + 6 = 9 m

Answer 2

Explanation:

Given: f=3.

To find: F+R=?

Formula:R=2F.

R=2(3)=6.

R+F=3+6=9.

Hope helps u.