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Q.

In a compound microscope, the focal lengths of two lenses are 1.5 cm and 6.25 cm an object is placed at 2 cm form objective and the final image is formed at 25 cm from eye lens. The distance between the two lenses is

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a

6.00 cm

b

7.75 cm

c

9.25 cm

d

11.00 cm

answer is D.

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Detailed Solution

L=vo+ue=uofouo−fo+feDfe+D⇒L=2×1.5(2−1.5)+6.25×25(6.25+25)=11cm
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