### Velocity Of Particle

Velocity of particle, regardless of its charge and mass, can be calculated using following formula:

To calculate speed in meters per second, multiply it by speed of light, 299,792,458 m/s.

This appears to be working good also for relativistic and rest mass:

And particle frequency:

When particle can't be at rest (like for example photon or neutrino), E_{0}, M_{0} and f_{0} are all 0, and equation simplifies to v=1.