A new look at the Feynman ‘hodograph’ approach to the Kepler first law
A new look at the Feynman ‘hodograph’ approach to the Kepler first law
Hodographs for the Kepler problem are circles. This fact, known since almost two centuries ago, still provides the simplest path to derive the Kepler first law. Through Feynman `lost lecture', this derivation has now reached to a wider audience. Here we look again at Feynman's approach to this problem as …