Two thin symmetrical lenses of different nature and of different mater – McqOptions

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1.	Two thin symmetrical lenses of different nature and of different material have equal radii of curvature R = 15 cm. The lenses are put close together and immersed in water \[(a=4/3).\] The focal length of the system in water is 30 cm. The difference between refractive indices of the two lenses is
A.	1/2
B.	1/4
C.	44256
D.	44289
Answer» D. 44289

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