Microscopes.

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Presentation transcript:

Microscopes

Compound Light Microscope Used for very thin (transparent )samples Uses a two lens arrangement to magnify image Magnification is calculated by multipling the ocular magnification times the objective magnification 400x is usually the max

Electron Microscopes Uses a beam of electrons to magnify the image Much more powerful than the light microscope 2 types of electron microscopes Transmission Scanning

Transmission Electron Microscope (TEM) Specimens must be dead Can magnify up to 200,000x Electrons are used to project images on a fluorescent screen Can see structures in side the cell (mitochondria, chloroplast)

Scanning Electron Microscope (SEM) Magnifies to 100,000x Uses electrons refracted off of metal to magnify image Shows the 3-D shape of the specimen