1. 1.5 Technological Advances of the Microscope (Text pages 17 and 18)

2. Key Ideas What are the different types of microscopes and how are they used?

3. 1.Single- lens microscope (SLM) -The year 1660’s -1 lens = 10x magnification 2. Compound light microscope (CLM) -The year 1857 -FSJSS -2 lenses -Glass lenses and light -Increasing thickness of lens= increasing mag. (can become blurry) -Max mag. = 2000 x -Any part of cell can be seen

4. 3. Transmission electron microscope (TEM) -The 1930’s -2 000 000 x mag. -electrons (not light) pass through cells -very thin slices of cells -dead cells

5. 4. Scanning electron microscope (SEM) -In the 1980’s -Electrons bounce off of cells -Thickness does not matter -Only 3 D images (out side of cell) -Less mag. than TEM