How the Optical Microscope Works
The most widely used microscopes are optical microscopes, which use visible light to create a magnified image of an object. The simplest optical microscope is comprised of one double-convex lens with a short focal length.
The compound microscope uses two lenses, an objective lens and an ocular lens, mounted at opposite ends of a closed tube, to provide greater magnification than is possible with a single lens.
The total magnification of a compound microscope is determined by the focal lengths of the two-lens system. This magnification can be more than 2000 times.
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