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The Use and Operation of the Light and Electron Microscope Light microscopes were first used in the seventeenth century, famously by the scientist Robert Hooke; the man that first named 'cells'. It was not until the nineteenth century however that microscopy became popular. Before this time, the lenses had not been of high enough quality to view images clearly, in the early nineteenth century improvements were made and the identification of cell structures began. Problems with resolution then became apparent; a wave length shorter than light needed to be used in order to improve the clarity of image produced; Electron microscopes were developed as a solution; both Ultraviolet light and X-rays have shorter wave lengths but it was found that these were extremely difficult to focus. Electrons, however, are negatively charged particles; this gives the advantage of being able to focus them easily, by use of electromagnets. These electromagnets act in exactly...

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