2.1.1 Observing Cells

• Light microscope (optical microscope)

  Tool that uses a beam of light and optical lenses to magnify specimens up to 1500 times life size
• Electron microscope

  Tool that uses a beam of electrons and magnetic lenses to magnify specimens up to 500 000 times life size
• Magnification

  A measure of how much bigger the image you see is than the real object
• Resolution (resolving power)

  A measure of how close together two objects can be before they are seen as one
• Transmission Electron Micrographs (TEMs)

  Micrographs produced by the electron microscope that gives 2D images like those from a light microscope, but magnified up to 500 000 times
• Scanning Electron Micrographs (SEMs)

  Micrographs produced by the electron microscope that have a lower magnification that TEMs, but produce a 3D image