1. Microscopes

2. 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

4. 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

5. 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)

6. 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