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What is the focal length of …

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What is the focal length of a lens whose radius of curvature is 30 cm.??

Posted by Rohit Singh 5 years ago

CBSE > Class 10 > Science

2 answers

Dali Das 5 years ago

Radius of curvature,r=30cm Focal lenght, f =? Now, f=R/2 f= 30/2 Therefore, f=15 cm

Gaurav Seth 5 years ago

Radius of curvature R = 30 cm

Radius of curvature = 2 × Focal length (f)

R = 2 f

Hence, the focal length of the given convex mirror is 15 cm.

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