On Feynman’s analysis of the geometry of Keplerian orbits
@article{Kowen2003OnFA, title={On Feynman’s analysis of the geometry of Keplerian orbits}, author={Michael Kowen and Harsh Mathur}, journal={American Journal of Physics}, year={2003}, volume={71}, pages={397-401} }
A geometrical construction, introduced by Maxwell and Feynman to demonstrate that closed Keplerian orbits are elliptical, is adapted to show that open Keplerian orbits are hyperbolic or parabolic.
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