From around 1861, James Clerk Maxwell synthesized and expanded many of these insights into Maxwell's equations, unifying electricity, magnetism, and optics into the field of electromagnetism. However, Gauss's interpretation of magnetism is not fully compatible with Maxwell's electrodynamics. In 1905, Albert Einstein used Maxwell's equations in motivating his theory of special relativity,A. Einstein: "On the Electrodynamics of Moving Bodies", June 30, 1905. requiring that the laws held true in all inertial reference frames. Gauss's approach of interpreting the magnetic force as a mere effect of relative velocities thus found its way back into electrodynamics to some extent.
from around 1861 james clerk maxwell synthesized and expanded many of these insights into maxwell's equations unifying electricity magnetism and optics into the field of electromagnetism however gauss's interpretation of magnetism is not fully compatible with maxwell's electrodynamics in 1905 albert einstein used maxwell's equations in motivating his theory of special relativitya einstein "on the electrodynamics of moving bodies" june 30 1905 requiring that the laws held true in all inertial reference frames gauss's approach of interpreting the magnetic force as a mere effect of relative velocities thus found its way back into electrodynamics to some extent