Quote:
Originally posted by Undertoad
They happen when the temperature is around freezing. When ice crystals form in the air as a type of light snow, they can flutter and reflect light only at certain angles. The light being reflected here is from an ice-skating complex in Anchorage.
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Oooh, does diffraction play a part here? Or do each of those pillars correspond to evenly-spaced lights around the skating complex?
Good ol' college physics class. Bad ol' memory.