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

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

Answers (3)

best_answer

As we know in any Spherical Mirror 

focal\:length=\frac{Radius }{2}

So,

focal\:length=\frac{20}{2}=10cm

Hence the Focal length of the spherical mirror is 10 cm.

Posted by

Pankaj Sanodiya

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Length=1/2*radius 

=1/2*20

10cm. Answer

Posted by

Shoaib malik

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Wkt,

In spherical mirror

Focal length=radius of curvature/2

                       =20/2

                       =10 cm

Posted by

Likitha

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