Assertion: newton | /r/CapableOf | understand the theory of optics
Facets:
value: during this time
type: TEMPORAL
Source sentences:
text: He wrote later that during this time he first understood the theory of gravitation, which we shall discuss below, and the theory of optics (he was the first to realize that white light is made up of the colors of the rainbow), and much mathematics, both integral and differential calculus and infinite series.