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| a longitudinal wave in an elastic medium, especially a wave producing an audible sensation |
| the ability of a substance to flow; a measure of this ability, the reciprocal of the coefficient of viscosity |
| cloud chamber | |
| —n | |
| physics Also called: Wilson cloud chamber an apparatus for detecting high-energy particles by observing their tracks through a chamber containing a supersaturated vapour. Each particle ionizes molecules along its path and small droplets condense on them to produce a visible track | |
| cloud chamber
A device used to observe the movements of charged atomic and subatomic particles, such as ions, electrons, or muons. Cloud chambers consist of a closed container filled with a gas that is on the verge of condensing. Charged particles passing through the gas ionize the atoms in their path, forming visible lines of condensation. Compare bubble chamber. |