Scanning Electron Microscope (Sem) - GCSE Biology Definition

Reviewed by: Lára Marie McIvor

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A Scanning Electron Microscope (SEM) is a powerful microscope that uses a beam of electrons instead of light to produce detailed images of the surface of a specimen. SEMs create three-dimensional images that show surface texture and structure in very high detail. This makes them useful for examining small objects like cells, leaf surfaces, or insect parts. Unlike light microscopes, SEMs can reveal much finer details, helping scientists study structures that are too small to see with the naked eye. In GCSE Biology, SEMs are studied as examples of advanced microscopy techniques used to explore the microscopic world.

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Lára Marie McIvor

Reviewer: Lára Marie McIvor

Expertise: Biology, Psychology & Sociology Subject Lead

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.

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