2 Of colours2 Of colours4 Of colours4 Of coloursOf coloursThe Newton Project Knowledge Graph2020-10-08Journal4 Of colours2 Of colours
3dly That the rays which make blew are refracted more than the rays which make red appeares from this experiment If one hafe of the thred abc be blew & the other red Figure & a shade or black body be put behind it then lookeing on the thred through a prism one halfe of the thred shall appeare higher than the other & not both in one direct line, by reason of unequall refractions in the 2 differing colours.
4 Hence rednes yellownes &c are made in bodys by stoping the slowly moved rays without much hindering of the motion of the swifter rays. & blew greene & purple by diminishing the motion of the swifter rays & not of the slower. Or in some bodys all these colours may arise by diminishing the motion of all the rays in greater or lesse geometricall proportion, for then there will be lesse difference in theire motions than otherwise