| 释义 |
Einstein-Planck law Einstein-Planck law[¦īn‚stīn ¦pläŋk ‚lȯ] (quantum mechanics) The law that the energy of a photon is given by Planck's constant times the frequency. (relativity) The equation of motion of a charged particle in an electromagnetic field, according to which its rate of change of momentum is equal to the Lorentz force, where the magnitude of the momentum is mv /(1 - v 2/ c 2)1/2, where m and v are the particle's mass and velocity, and c is the speed of light. |