Newton’s Color wheel

Newton discovered that white light was made of seven visible colors: red, orange, yellow, green, blue, indigo, and violet, based on his prism experiment.

Newton was the first to understand what a rainbow is: he used a prism to refract white light and break it down into its primary colors: red, orange, yellow, green, blue and violet. This is known as Newton's prism.

Newton's prism experiment showed that white light from the sun is actually made up of many different colors. He demonstrated this by shining sunlight through a glass prism, which made the light spread out into a rainbow of colors, from red to violet. This experiment helped us understand that white light is a mix of all these colors. When you put these colors back together, you get white light again.

When the color wheel rotates as fast as possible, either manually with a crank or with electricity, we see white light.