Of his rainbow experiment Newton wrote that he had projected white light through a prism onto a wall and had a friend mark the boundaries between the colors, which Newton then named. In his diagrams, ...

When I learned about colors in grade school everything started with red, yellow, and blue and getting fancier colors was easy. I mixed some blue into my yellow to get green, or into red to get ...

Childrens' rainbow pictures have become a familiar sight in windows across the UK and have become a symbol of hope during the coronavirus crisis. Rainbows have symbolised many things over the ...