. Shown in the figure here is a convergent lens placed inside a cell f – McqOptions

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1.	. Shown in the figure here is a convergent lens placed inside a cell filled with a liquid. The lens has focal length + 20 cm when in air and its material has refractive index 1.50. If the liquid has refractive index 1.60, the focal length of the system is [NSEP 1994; DPMT 2000]
A.	+ 80 cm
B.	? 80 cm
C.	? 24 cm
D.	?100 cm
Answer» E.

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