Question

The radius of curvature of a spherical mirror is 20cm, what is it's focal length?​

Answer 1

Explanation:

• The radius of curvature of a spherical mirror is 20cm, what is it's focal length?
• The radius of curvature of a spherical mirror is 20 cm. What is its focal length? Therefore, the focal length of the spherical mirror is 10 cm.
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Answer 2

Answer:

radius of the curvature of the mirror is defined by the radius of the sphere from which the mirror was cut from. Therefore the radius of curvature of a plane mirror is infinite in length

Radius of curvature (R) = 20 cm

Radius of curvature of a spherical mirror = 2 X Focal length (f)

R= 2f

f= R/2

f = 20 / 2

f = 10

Hence, the focal length of the given spherical mirror is 10 cm