Light Microscope – uses a number of lenses to produce an image that can be viewed directly at the eyepiece. Light passes from a bulb under the stage, through a condenser lens and then through the specimen. This beam of light is passed through an objective lens (x4, x10, x40) and then the eyepiece lens (x10)
Transmission Electron Microscope (TEM) – uses electromagnets to focus a beam of electrons, which is transmitted through the specimen. Denser parts of the specimen absorb more electrons, which makes them look darker on the image you end up with creating a contrast.
Scanning Electron Microscope (SEM) – an electron beam is scanned across the specimen. The electrons don’t pass through the specimen, they bounce off and are detected at multiple detectors.
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