the use of electrons

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  • The use of Electrons.
    • Light microscopes have a low resolution.
      • This means that is the magnification is above x1500, the image isn't clear.
        • We can achieve higher resolution with electron microscopes.
    • Electron microscopes generate a beam of electrons.
      • Electron microscopes can distinguish between objects 0.2nm apart.
        • These microscopes use magnets instead of lenses to focus the bream of electrons onto a prepared specimen.
          • Electrons are not visible to the human eye.
            • The image produced from the electron beam is projected onto a screen or onto photographic paper to make a black-and-white image.
              • Such images are called ELECTRON MICROGRAPHS.


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