The object is placed close to the front, or objective, lens. The objective lens forms an enlarged real image.

This real image is then viewed through the eyepiece which acts as a simple magnifier to further enlarge the image.

The linear magnification provided by the objective lens is

The eyepiece acts as a simple magnifier, so its magnification is

The total magnification of a microscope is

Simple Magnifier


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(c) Doug Davis, 2003; all rights reserved