Question

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

Answer 1

Answer:

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Radius of curvature = 20cm

Focal length = R/2

= 20cm/2

= 10cm

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Answer 2

Given:

Radius of curvature of a spherical mirror = 20cm

To find:

Focal length

Solution:

Radius of curvature = 2 * focal length

R = 2f

20 = 2f

f = 20/2

f = 10cm

Conclusion:

Therefore, the spherical mirror which is having a radius of curvature of 20cm have 10cm of focal length.