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| the distance measured by the propagation of a wave between two successive points in the wave that are characterized by the same phase of oscillation |
| the meeting of particles or of bodies in which each exerts a force upon the other, causing the exchange of energy or momentum |
| weak interaction or weak force | |
| —n | |
| physics interaction See electroweak interaction weak nuclear interaction, Also called: weak nuclear force an interaction between elementary particles that is responsible for certain decay processes, operates at distances less than about 10--15 metres, and is 1012 times weaker than the strong interaction. The weak interaction and electromagnetic interactions are now described by the unifying electroweak theory | |
| weak force or weak force | |
| —n | |
| weak interaction
See weak force. |