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Q.58. The focal lengths of the objective and the eyepiece of a microscope are 2 cm and 7 cm respectively. The separation between the lenses is 20 cm. At what distance from the objective should the object be placed to get the image at a distance of 25 cm from the eyepiece?
(a) 3.219 cm
(b) 2.319 cm
(c) 3.291 cm
(d) None of these
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Here is a link which will definitely help you to solve this question with proper explanation .
https://www.meritnation.com/ask-answer/question/the-focal-lengths-of-the-objective-and-the-eyepiece-of-a/ray-optics-and-optical-instruments/10563161
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Here is a link which will definitely help you to solve this question with proper explanation .
https://www.meritnation.com/ask-answer/question/the-focal-lengths-of-the-objective-and-the-eyepiece-of-a/ray-optics-and-optical-instruments/10563161
Regards