|Niels Bohr electromagnetism
The Bohr magneton is the magnitude of the magnetic dipole moment of an electron in a circular orbit with an orbital angular momentum equal to the reduced Planck constant. The Bohr magneton is not merely the natural unit of magnetism, but a physical constant, like the speed of light, that characterizes our universe.
The value of the Bohr magneton is related to Bohr’s model of the atom. It measures the magnetic moment of a single electron orbiting an atom. It is the electric charge of a proton times the Planck constant divided by 2π divided by 2 times the electron rest mass times the speed of light.
Universal constants Electromagnetic constants Atomic and nuclear constants Physico-chemical constants To understand how things work, we construct a theoretical model and then establish that all our measurements can be constructed from fundamental values. We hold these values to be constant for all time, everywhere in the universe, unlike mathematical constants like π, unlike desire, or free will. True idealists are not Platonic philosopers, not even young lovers, but theoretical physicists.