File:Iridiscent Meat.png

English: Muscle tissue of a pork loin sample displays iridescence when viewed at a specific angle. (a) The loin muscles sliced transversely to the long axes of muscle fibres. (b) Section planes of muscle tissue prepared for observing fibres from different angles. (c) A schematic of the periodicity of muscle fibres and fibrils. (d) The light interference with a diffraction grating comprising a constant refractive index and periodicity. (e) A pyramidal cut of the muscle tissue showing the angular dependence of iridescence colours, and the prevalence of the iridescence along the sample. (f) Microscopic images of the surface of the muscle tissue illuminated at the angle θ_i to produce the maximum diffraction. http://www.mdpi.com/2304-8158/2/4/499