“It has no justification in experiment exactly; it just represents something that he’s imposing upon the color spectrum by analogy with music.” Of his rainbow experiment Newton wrote that he had ...

It's one thing to know that the theory of colors is based on the wheel of various colors, but it's another to understand why ...

But, naturally secretive, he kept his ideas to himself. Newton continued to experiment in his laboratory. This mix of theory and practice led him to many different kinds of discoveries.

Newton’s theory of universal gravitation says that ... Newtonian telescopes use a reflecting mirror to avoid the colour distortion and rainbow effect afflicting telescopes that use lenses.