Optics Question 341

Question: The length of the compound microscope is 14 cm. The magnifying power for relaxed eye is 25. If the focal length of eye lens is 5 cm, then the object distance for objective lens will be

[Pb. PMT 2002]

Options:

A) 1.8 cm

B) 1.5 cm

C) 2.1 cm

D) 2.4 cm

Show Answer

Answer:

Correct Answer: A

Solution:

L=vo+fe

14=vo+5

vo=9 cm Magnifying power of microscope for relaxed eye m=vouo.Dfe or 25=9uo.255 or uo=95=1.8 cm



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