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A double convex lens (R(1)=R(2)=10 cm) h...

A double convex lens (`R_(1)=R_(2)=10 cm`) having focal length equal to the focal length of a concave mirror. The radius of curvature of the concave mirror

A

10 cm

B

20 cm

C

40 cm

D

15 cm

Text Solution

Verified by Experts

The correct Answer is:
B
(b) we have, `1/f=(1.5-1)(1/10+1/10)`
`therefore` Focal length, f= 10 cm
Radius of curvaature, R=2f=20 cm
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