This man's oscillator model of the atom predicts a radiation reactive force proportional to the charge and the jerk of a particle in an electric field. The intensity of that force follows a distribution named for Cauchy and this man. The identity component of his namesake group is isomorphic to the group of Mobius transformations on the Riemann sphere. That group contains 
This man's oscillator model of the atom predicts a radiation reactive force proportional to the charge and the jerk of a particle in an electric field. The intensity of that force follows a distribution named for Cauchy and this man. The identity component of his namesake group is isomorphic to the group of Mobius transformations on the Riemann sphere. That group contains all isometries of Minkowski space which preserve the identity, this man's namesake transformations, which preserve the metric time-squared minus the space coordinates each squared. The force exerted on a particle by the electromagnetic fields is named for him, and this man proposed length contraction as a way to explain the results of the Michelson-Morley experiment. For 10 points, name this Dutch physicist whose namesake factor is used to determine how much time "dilates" at relativistic speeds.
This man's oscillator model of the atom predicts a radiation reactive force proportional to the charge and the jerk of a particle in an electric field.
Hendrik Lorentz