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a person with normal near point 25 cm using a compound microscope with objective of focal length 8 mm and an eye piece of focal length 2.5 cm can bring an object placed at 9 mm from the objective in sharp focus.the separation between two lenses and magnification respectively are 1]9.47cm,96 2]3.36cm,44 3]6cm,22 4]7.49cm,11
For sharp focus, image should be formed at infinity.For image to be at infinity, The image formed by the objective should be at the focus of the eyepiece.WKT, Magnification(m)= vo/uo(D/fe)m=2.5/0.9(25/2.5)m=2.5(10)/0.9m=250/9
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