单词 | rest frame |
释义 | rest framenoun Physics A frame of reference relative to which a given body is at rest.Soon afterwards it was realized that if the energy of a cosmic-ray proton exceeded 5 x 10 9 GeV then, in its rest frame, a typical cosmic-background photon would be Lorentz-boosted to gamma-ray energies high enough to excite the proton....
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