Answer-
According to the question, radius of curvature (R) is 20 cm
Expression for radius of curvature of the spherical mirror is
= 2 × Focal length (f)
So, R = 2f
Or, f= R/2 = 20 / 2
f = 10
Therefore, focal length of the spherical mirror is 10 cm.
The radius of curvature of a spherical mirror is 20 cm. What is its focal length?
The radius of curvature of a spherical mirror is 20 cm. What is its focal length?