A formula developed for one type of this process scales the inverse of the magnetic field intensity, and was observed when its namesake was using a magnetic arc to separate uranium isotopes. Another form of this process is explained by the Ludwig-Soret effect, which results in a temperature gradient parallel to the concentration gradient. A set of 
A formula developed for one type of this process scales the inverse of the magnetic field intensity, and was observed when its namesake was using a magnetic arc to separate uranium isotopes. Another form of this process is explained by the Ludwig-Soret effect, which results in a temperature gradient parallel to the concentration gradient. A set of equations, which relate flux to the gradient of concentration also governs this process, and its rate is inversely proportional to the square root of the molar mass according to Graham's Law. For 10 points, identify this process, wherein particles move from regions of high concentrations to areas of lower concentrations.
A formula developed for one type of this process scales the inverse of the magnetic field intensity, and was observed when its namesake was using a magnetic arc to separate uranium isotopes.
diffusion