| 11. | An electron, on the other hand, has a rest mass which means it has a non-zero rest energy.
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| 12. | They can perish together, converting their combined rest energy into photons having electromagnetic radiant energy, but no rest mass.
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| 13. | So a mass at rest in some inertial reference frame has a corresponding amount of rest energy equal to:
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| 14. | The relativistic mass is always equal to the total energy ( rest energy plus kinetic energy ) divided by.
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| 15. | But the rest energy of a particle is an invariant property of that particle which is useful in physics.
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| 16. | At the high photon energies comparable to the electron rest energy of, Compton scattering, another process, may take place.
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| 17. | It has been shown that at energies of the order of the Z 0 boson rest energy, 90 GeV, that:
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| 18. | The remaining term is the negative of the particle's rest energy, a constant term which can be ignored in the Lagrangian.
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| 19. | By considering the emission of energy in different frames, Einstein could show that the rest energy has a real physical meaning.
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| 20. | The quantity Mc ^ 2 will be recognized from special relativity as the rest energy of the large body, the earth.
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