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CBSE Class 12-science Answered

derive the expression for the magnifying Power and the length of a compound microscope using two convex lenses.
Asked by kamleshstarone392 | 16 Apr, 2022, 06:26: AM
answered-by-expert Expert Answer
Telescope  has an objective lens and an eyepiece lens as shown in figure. Objective lens has a large focal length
and a much larger aperture than the eyepiece lens . Light from a distant object enters the objective and a real image is formed
in the tube at its second focal point. The eyepiece magnifies this image producing a final inverted image.
 
The magnifying power m is the ratio of the angle β subtended at the eye by the final image to the angle α which
the object subtends at the lens or the eye.
 
begin mathsize 14px style m space equals space beta over alpha space almost equal to h over f subscript e cross times f subscript o over h space equals space f subscript o over f subscript e end style
 
 
Answered by Thiyagarajan K | 16 Apr, 2022, 11:12: AM
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