The two lens of different power are given as shown below in the figure – McqOptions

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1.	The two lens of different power are given as shown below in the figure. When both the lens is placed in contact with each other, the focal length of the combined lens is:
A.	20 diopter
B.	22 diopter
C.	24 diopter
D.	16 diopter
E.	None of these
Answer» D. 16 diopter

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