A double convex lens \[({{R}_{1}}={{R}_{2}}=10\,cm)\]\[(\mu =1.5)\] ha – McqOptions

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1.	A double convex lens \[({{R}_{1}}={{R}_{2}}=10\,cm)\]\[(\mu =1.5)\] having focal length equal to the focal length of a concave mirror. The radius of curvature of the concave mirror is [Orssia PMT 2004]
A.	10 cm
B.	20 cm
C.	40 cm
D.	15 cm
Answer» C. 40 cm

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