This site is no longer being updated. The Vega Science Trust closed in March 2012, and this site has been left here for reference purposes.
Amand Lucas. An elegantly simple optical diffraction demonstration with an inexpensive laser pointer is used to show the way in which x-rays can reveal the structure of crystals, and in particular, the double helix structure of DNA.
Links To Other Information:Grating Image
Image of the slide used by Amand
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