microscopes

Lucy Youle
Mind Map by Lucy Youle, updated more than 1 year ago
Lucy Youle
Created by Lucy Youle over 6 years ago
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Description

Mind Map on microscopes, created by Lucy Youle on 11/08/2014.

Resource summary

microscopes
  1. light
    1. resolution=200nm
      1. bulb>
        1. stage>
          1. condenser lens
            1. specimen
              1. objective lens
                1. eyepiece lens
                  1. x10
                  2. x4, 10, 40, 100
        2. mag= x1500
          1. staining- coloured dyes bind to biological organisms
            1. sectioning- specimens embedded in wax
            2. electron microscopes
              1. TEM & SEM
                1. X500,000. RS=0.2nm
                  1. beam passes through
                    1. 2d images
                  2. x100,000 RS=0.2nm
                    1. beam bounces off, produces 3d images
                  3. electrons have a wavelength of 0.004nm
                    1. limitations: need a high degree of skill and training.
                      1. very expensive
                        1. air molecules deflect electrons so needs to be done in a vaacuum
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