Question

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

Answer 1

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The radius of curvature of a spherical mirror is 20 cm.

so,

f = R/2

=20/2 =10cm

so,the focal length will be be 10cm

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Answer 2

Step-by-step explanation:

The radius of curvature of a spherical mirror is 20 cm.

so,

f  =  R/2

  =20/2 =10cm

so,the focal length will be be 10cm