- #1

Aaron121

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Is the mass that appears in

**E=mc**the rest mass^{2}**m**or the relativistic mass γ_{0},**m**?_{0}You are using an out of date browser. It may not display this or other websites correctly.

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- #1

Aaron121

- 15

- 1

Is the mass that appears in **E=mc**^{2} the rest mass **m**_{0}, or the relativistic mass γ**m**_{0}?

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- #3

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I would actually say neither. The big revelation of that equation (as originally conceived) is that the rest energy of an object is equal to the inertia at low velocities (multiplied by ##c^2##). As such, ##m## would be the inertial mass from the limit of classical mechanics. This is now so ingrained into the nomenclature that we refer to the rest energy simply as "the mass" (modulo the multiplication by ##c^2##, but we normally work in units where ##c = 1##).Is the mass that appears inE=mcthe rest mass^{2}mor the relativistic mass γ_{0},m?_{0}

"Relativistic mass" is a historical leftover in popular literature, it should typically be avoided in scientific use.

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