Recall how Newton's investigation of light followed one form of scientific method

Observation of experiment and intervention in newton's optics. newton followed the principle of light through prisms and the rays transmitted through them as a part of his observation. Various properties of light and its characteristics were exposed.

Explanation:

Newton's investigation of light was based on prisms, lenses and optical rays. He stated that lights differing in colour also differed in degrees of re-frangibility. To support his theories newton employed "Proof by experiments" method. Each method was designated in revealing a specific property of light. A phenomenon known as Newton rings were discovered by newton. Newton recognized after pressing together two prisms that there was a transparent spot.