Formula: Relativistic Energy-Momentum Relation

Formula: Relativistic Energy-Momentum Relation
Mechanical momentum of a spacecraft


Relativistic total energy of a body, which is also valid at high velocities.

Rest energy

Rest energy is the energy of the body in its resting frame of reference. The rest energy of a photon is zero.


Relativistic momentum of the body.

Speed of light

Speed of light is a physical constant and indicates how fast light travels in empty space (vacuum). It has the following exact value in vacuum: $$ c ~=~ 299 \, 792 \, 458 \, \frac{ \mathrm{m} }{ \mathrm{s} } $$

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