2. History of Cell Theory

3. Why Cells?

4. Limits of Light Eye Piece MagObjective Mag 10x4x 10x 40x 100x (oil emmersion)

5. Question 1.2 and 1.3 20 μm  average animal cell 6mm (60,000 μm)  diagram 60,000/20 = x3000 x20,000  Mag 65mm (65000 μm)  diagram 65000/20,000= 3.25 μm Max res. Of light microscope is 200nm and ribosomes are only 22nm in diameter

6. Mag/Res Practice 700nm  line between VL/Infrared Resolution = ½ radiation used 0.5 * 700nm  350nm 9mm  9000μm 9000 μm / 75,000 = 0.12 μm (120nm) 120nm = 0.5 x wavelength of radiation Wavelength= 240 nm (UV light)

7. Measuring Cells

8. Electromagnetic Spectrum

9. Electron Microscopes

10. Types of Electron Microscopes

11. Homework