E=mc² is Incomplete
02:07

E=mc² is Incomplete

Key Facts In This Video

  • 1

    E=mc^2 only describes objects that have mass and that aren't moving. (0:06)

  • 2

    The equation for the energy of a moving, massless particle (such as a photon) is E=pc. (0:43)

  • 3

    An object's velocity is equal to the speed of light times the ratio of the object's momentum to energy. (1:08)

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