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 mirrorA. 10 cmB. 20 cmC. 40 cmD. 15 cm

A double convex lens (`R_(1)=R_(2)=10 cm`) having focal length equal t

1.	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 mirrorA. 10 cmB. 20 cmC. 40 cmD. 15 cm
Answer» Correct Answer - 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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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 mirrorA. 10 cmB. 20 cmC. 40 cmD. 15 cm

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