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Scanning Electron Microscope

The scanning electron microscope scans the surface of the specimen with a beam of electrons.The electrons reflected off the surface are focused onto a screen or photographic plate into a three-dimensional image.The resolution of the scanning electron microscope (SEM) is 3 - 10nm.

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Specification: AQA Biology (7401), AS-level, 3.2.1.3 Methods of studying cells. Topic: Cell Structure.

Key terms in this lesson

resolution
The ability of a microscope to distinguish between two points that are close together as separate objects.

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