Theories of Light: From Descartes to Newton

accepted according action actual already angle appeared argument asserted assumed assumption Bacon ball bodies called Cartesian cause colours concerning conclusion consequently considerations considered consists Correspondence deduced demonstration Descartes determination difficulties Dioptric direction distance doctrine effects equal example exist experimental experiments explain expressed fact Fermat fits force further give given greater Hooke Hooke's Huygens hypothesis Ibid idea incidence interpretation later least less letter light matter means mechanical medium method motion move movement nature Newton objections observed optical original parallel Pardies particles particular pass passage perpendicular phenomena physical position possible principle prism problem produced proof propagation properties proved published pulse question rays reason reference reflection refraction regarding remarks result seen side sine speed suggested supposed supposition surface theory things tion true truth understand various velocity wave white light wrote