Rainbow which a glass prism could separate into the full spectrum of colours, rejecting the theory that the colours were produced by a modification of white light. He also showed that red light is refracted less than blue light, which led to the first scientific explanation of the major features of the rainbow. Newton's corpuscular theory of light was unable to explain supernumerary rainbows, and a satisfactory explanation was not found until Thomas Young realised that light behaves as a wave under certain conditions, and can interfere with itself. Young's work was refined in the 1820s by George Biddell Airy, who
DIY rainbow crossing activities around the world. The idea to create rainbow crosswalks appears to have first emerged in West Hollywood as part of the 2012 Gay Pride Month celebrations, initially proposed by the LA based artist Martin Duvander with the crosswalks at the intersection of San Vicente Boulevard and Santa Monica Boulevard painted rainbow colours for the month of June. In May 2012, Tel Aviv city hall painted a crosswalk in rainbow colours for a photo shoot to promote "TYP: Ivri Lider and Johnny Goldstein", the act scheduled to headline the Gay Pride Parade's main concert. These photos, reminiscent of the Beatles