Puzzle of leaping liquid solved
Physicists explain how shampoo streams can bounce.
Philip Ball
Dutch researchers believe they have cracked the physics behind a mysterious bouncing behaviour of liquids, first seen more than 40 years ago.
British engineer Arthur Kaye first noticed this weird phenomenon in 1963, while experimenting with a mixture of obscure organic liquids. When he poured his viscous mixture on to a surface, the down-going stream would suddenly throw up a jet that merged with the incoming stream.
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Videos of the phenomenon.
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