A convex lens of focal length 84 cm is in contact with a concave lens – McqOptions

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1.	A convex lens of focal length 84 cm is in contact with a concave lens of focal length 12 cm. The power of combination (in diopters) is [MP PET 1991]
A.	25/24
B.	25/18
C.	- 50/7
D.	7.14285714285714
Answer» C. - 50/7

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