Visible+Spectrum+Newton

A stoplight has the colors green, yellow, and red. Every color can be made with red, green, and blue light. White light is an even mixture of red, green, and blue. (Put drops of water on a white area of your screen to see this.) Blue light has a wavelength of about 475 nm. Green light has a wavelength of about 510 nm. Yellow light has a wavelength of about 570 nm. Red light has a wavelength of about 650 nm. In a stoplight, what color of light is not used to produce yellow light? ................................................ http://www.physicsclassroom.com/class/light/Lesson-2/Visible-Light-and-the-Eye-s-Response .................................................. How a prism works by refraction []

Colors of light Newton's Prism Experiment - Lens method https://www.youtube.com/watch?v=uucYGK_Ymp0 Herschel Prism Experiment - Discovery of infrared light https://www.youtube.com/watch?v=36MLi4bFMNY

Newton experimented and found that white light is all the colors of the visible spectrum combined. Before this people thought white light was pure and substances just modified the white light. Newton separated while light into the visible spectrum with a prism. He then tried to separate each color into more colors with a second prism. Newton found that the colors wouldn't separate again. To show that white light is made up of different colors of light Newton newton used a second prism to combine different colors of light back into white light.



http://www.webexhibits.org/colorart/bh.html

http://www.thestargarden.co.uk/Newtons-theory-of-light.html

[|Newton Dark Secret]