Not a rainbow!

Watch the full video: https://www.youtube.com/watch?v=9udYi7exojk When Isaac Newton originally observed a rainbow of light split by a prism and made his labeling of the colors as "RedOrangeYellowGreenBlueIndigoViolet", the thing he called “blue” was indeed what we would now call blue-green, or teal or cyan – reminiscent of the color of the blue sky. And what we now tend to call blue, Newton called violet - as in, roses are red, violets are blue. Dark blue. He only included indigo in his fundamental "seven colors of the rainbow” so that they would match the number of notes of the western musical scale: Do re mi fa so la ti… yeah. Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich