Q&A: How, by making crystals, did that enable dorothy hodgkin or Rosalind Franklin to make their discoveries?

Emmy,
1931, she first began to specialise in X-ray crystallography and discovered that if you shine a bright light through a fine grating you will see a pattern – a diffraction pattern – caused by the deflection of light as it passes through the regularly spaced slits in the grating. The same principle can be applied to the regular structures of crystals, using X-rays instead of visible light. X-rays have wavelengths that are similar to the spacing between atoms in many crystals. Shining X-rays through a crystal produces a pattern of dark points on ‘plates’ incorporating X-ray sensitive paper. This pattern indirectly represents the arrangement of atoms in the crystal – in other words, its structure. The experiments are straightforward, the analysis difficult. The more atoms there are in the crystal, the more intricate the analysis becomes. Hodgkin later pioneered the use of computers to handle the complex mathematics involved in determining crystal structures by X-ray crystallography.

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I add a link with details of this subject

http://www.bikwil.com/Vintage29/
Hodgkin-and-Kraepelin.html

Hope this helps
matador 89