# Formula Gamma Factor (Lorentz Term) Lorentz Factor    Velocity    Speed of light

## Lorentz Factor

Unit
The Lorentz factor occurs in the relativistic equations and gives the factor by which, for example, time $$t'$$ in a moving reference frame A differs from time $$t'$$ in a reference frame B at rest: $$t' = \gamma \, t$$. The Lorentz factor is always greater than 1.

## Velocity

Unit
Velocity of the reference frame moving relative to a specified system at rest.

## Speed of light

Unit
Vacuum light speed is the maximum speed in our universe and has the value: $$c = 299 \, 792 \, 458 \, \frac{\mathrm m}{\mathrm s}$$.