Question

The radius of curvature of a spherical mirror is 20 cm. What is its focal length?​

Answer 1

Answer:

then the answer in 40 becauseR=2f

Answer 2

Answer:

10cm

Explanation:

we know that,

R=2f(R-radius of curvature f-focal length)

f=R/2

GIVEN,

R=2

then,

f=20/2

f=10

HOPE IT HEPLS