NEET-XII-Physics
19: Optical Instruments
- #7The magnifying power of a converging lens used as a simple microscope is
1+Df.A compound microscope is a combination of two such converging lenses. Why don’t we have magnifying power
1+Dfo1+Dfe?In other words, why can the objective not be treated as a simple microscope but the eyepiece can?Ans : In a simple microscope, the converging lens is used to magnify the object. It is done by the eyepiece in a compound microscope. But the purpose of the objective lens is the same, i.e., to form an enlarged, real and inverted image of the object at a distance less than the focal length of the eyepiece. So, its magnification power cannot be expressed in a way it is expressed for a simple microscope.
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