WordReference Random House Unabridged Dictionary of American English © 2017
bubble cham′ber, [Physics.]
  1. Physicsan apparatus for determining the movements of charged particles, consisting of a chamber containing a superheated transparent liquid that, by boiling and producing bubbles in the path of an ionizing particle, indicates the path of the particle. Cf. cloud chamber.
  • 1950–55


Collins Concise English Dictionary © HarperCollins Publishers::

bubble chamber n
  1. a device that enables the tracks of ionizing particles to be photographed as a row of bubbles in a superheated liquid. Immediately before the particles enter the chamber the pressure is reduced so that the ionized particles act as centres for small vapour bubbles



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