eli5: I saw a post on instagram saying “Sonoluminescence – If you collapse an underwater bubble with a soundwave, light is produced, and nobody knows why” is this true?
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The phenomenon of sonoluminescence is 100% real and well documented. To say that “no one knows why” it happens is misleading though. It’s not some mystery we can’t explain, in fact there are multiple possible explanations proposed for why it happens. There just hasn’t been enough research into it yet to confirm for sure exactly which one it is.
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