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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
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 are1]9.47cm,962]3.36cm,443]6cm,224]7.49cm,11


4 years ago

Raveesh
12 Points
							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,$\frac{1}{f}$                             Magnification(m)= vo/uo(D/fe)m=2.5/0.9(25/2.5)m=2.5(10)/0.9m=250/9

4 years ago
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Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions