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Understanding the Science Behind Sunspin
The formation of a sunspin is rooted in the principles of optics, specifically refraction and reflection of light. Unlike halos, which are formed by random orientations of ice crystals, sunspins require a degree of ordered alignment. The plate-like ice crystals, as they fall, tend to orient themselves horizontally, due to their shape and the influence of air currents. When sunlight strikes these aligned crystals, it's refracted – bent – as it enters and exits the ice. The specific angle of refraction depends on the shape and orientation of the crystal.
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