Invented by Anton von Leeuwenhoek.
Microscopes
Light Microscope: beam of light passes through 2 lenses.
Objective lens: closer to specimen.
Ocular lens: in eyepiece.
Magnification: 1000 x.
Microscopes
Transmission Electron Microscope: uses beam of electrons instead of light.
Magnetic lenses focus on a fluorescent screen.
Magnification: 2 million times.
Microscopes
Scanning Electron Microscope: scans surface with a beam of electrons.
Specimen sprayed with fine metallic mist.
Produces 3-D image.
Magnification 50,000 times.
Microscopes
Scanning Tunneling Microscope
No lenses needed.
Can be used on living specimen.
Uses electrons that come from the surface of the specimen.
Produces 3-D image.
Magnification: 100 million times.