Relativistic Wave Mechanics of Electrons Deflected by a Magnetic Field

It is shown that the relativistic wave equation for electrons in a uniform magnetic field leads to the same wave function as that already deduced by Page from the non-relativistic equation. As in the latter case the motion at right angles to the field is quantized.

An expression is found for the current density from the relativistic wave equation. The relativistic expression differs from the non-relativistic only by a constant factor which does not affect the calculation of the mean radii of curvature of the electron current.

Hence, for the relativistic case, as for the non-relativistic, the mean radius of curvature is less than that expected on the classical theory. It follows that the classical relativistic relation between $\frac{\epsilon }{\mu }$ and the mean radius of curvature upon deflection gives a value of $\frac{\epsilon }{\mu }$ which is too large.