History of Cell Theory Why Cells? Limits of Light Eye Piece MagObjective Mag 10x4x 10x 40x 100x (oil emmersion)

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Presentation transcript:

History of Cell Theory

Why Cells?

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

Question 1.2 and 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

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)

Measuring Cells

Electromagnetic Spectrum

Electron Microscopes

Types of Electron Microscopes

Homework

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