indefinite Degrees of Refrangibility, by Prop. 1. And those infer as many Simple Colours, by Def. 1 and 3. and Prop. 2 and
To make these a little plainer, I have added also the Propositions that follow.
- The Rays of Light do not act on one another, in passing through the same Medium.
- The Rays of Light suffer not any change of their Qualities from Refraction.
- Nor afterwards from the adjacent quiet Medium: These two Propositions are manifest de Facto in Homogeneal Light, whose Colour and Refrangibility is not at all changeable, either by Refraction, or by the Contermination of a quiet Medium. And as for Heterogeneal Light, it is but an Aggregate of several sorts of Homogeneal Light, no one sort of which suffers any more alteration than if it were alone; because the Rays act not on one another, by Prop. 6. and therefore the Aggregate can suffer none. These two Propositions also might be further proved apart, by Experiments too long to be here described.