Did you know?
Einstein's special theory of relativity results in an effect that would be observed as "traveling forward through time." Check out the "Twin Paradox" at the Einstein Light website.

Since particles accelerators accelerate particles to energies at which they obtain a significant fraction of the speed of light, Einstein's theory of relativity must be taken into account. "Einstein Light" is an excellent site to learn more about relativity.

In a particle accelerator situation, the charged particle is also affected by relativity. Due to the relativistic speed of the charged particle in the accelerator, the effect of the magnetic field on it would be affected by a factor of gamma due to the relativistic mass (mass changed by a factor of gamma). The force on the particle does not change, but the acceleration does to the Lorentz force and F = ma, so

a = (qv x B) / (GAMMA*mo)

The effect of the electric field is changed in a similar manner. The relativistic (reduced) acceleration due to an electric field is given by

a = kq1q2z / [GAMMA*mo (z2 + R2)3/2]