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| a device that produces a nearly parallel, monochromatic, coherent beam of light by exciting atoms to a higher energy level and causing them to radiate |
| the elasticlike force existing in the surface of a liquid caused by asymmetries in the intermolecular forces between surface molecules |
triton
nucleus of the heaviest hydrogen isotope, tritium, or hydrogen-3. Tritons, which consist of one proton and two neutrons, result from certain nuclear reactions. The collision of a deuteron with another deuteron, for example, sometimes produces a proton and a triton. See also tritium.
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