microscope: Simple Microscopes

Simple Microscopes

A magnifying glass, an ordinary double convex lens having a short focal length, is a simple microscope. The reading lens and hand lens are instruments of this type. When an object is placed nearer such a lens than its principal focus, i.e., within its focal length, an image is produced that is erect and larger than the original object. The image is also virtual; i.e., it cannot be projected on a screen as can a real image.

Sections in this article:

Introduction
Electron Microscopes
Modified Compound Microscopes
Development and Uses
Computation of Magnifying Power
Compound Microscopes
Simple Microscopes
Bibliography

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