Scanning Electron Microscope (Sem) - GCSE Biology Definition

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.