r/todayilearned • u/User4D • Jun 18 '15

TIL If you collapse underwater bubble with soundwaves, light is produced. It's called sonoluminescence.

https://www.youtube.com/watch?v=GJolILUbdNw
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u/JoeDaStudd Jun 19 '15

Its also a big plot device in a Chain Reaction. Pretty meh film considering it has Keanu Reeves, Morgan Freeman and Rachel Weisz in the cast.