DNA diffraction

In this experiment, we observe diffraction on an optical (magnified) model of DNA. We calculate the parameters of the DNA structure using the diffraction pattern. Rosalind Franklin’s cross-shaped X-ray pattern led to the development of a model of the DNA structure. This X-ray pattern was shown in Watson and Crick’s 1962 Nobel Prize-winning paper. https://en.wikipedia.org/wiki/Photo_51

Photonic Crystals

Photonic crystals are materials with periodic variation of refractive index on a scale comparable to the wavelength of light. In this experimental problem, we study the properties of photonic crystals based on porous films of anodic aluminum oxide (AAO). The structure of AAO porous films is a system of disjoint cylindrical channels with a diameter less than …

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