Scanning Electron Microscope (GC-10)
In the SEM a very thin beam of electrons is focused on a small sample and then is scanned across the specimens by electromagnetic lenses. When it hits the sample, it causes secondary electrons to fly off. These electrons are detected and amplified by sophisticated electronic equipment to form pictures on a tube lie a TV screen that can be photographed to provide a lasting record.
Information gained by using the scanning electron microscope has proved useful in exploring for petroleum, metallic ores, clay, limestone and coal.
Our Hoosier State Beneath Us: Geochemistry/Geophysics