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

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Presentation transcript:

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

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

1.Single- lens microscope (SLM) -The year 1660’s -1 lens = 10x magnification 2. Compound light microscope (CLM) -The year 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

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

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