In 1666, while young Isaac Newton was quarantined in a dark bedroom to avoid catching the plague, he noticed a tiny beam of light pouring through a hole in his window. Using a glass prism, he bent the light to make a rainbow of red, orange, yellow, green, blue, and indigo. (Not violet, but that’s coming. For now, it’s just ROYGBI.)
Next, he reunited the ribbons of light using a second prism, turning them a solid white again. This was how he proved that light, which we perceive as white, is actually made up of several colors.
Newton then drew a chart of the six rainbow colors, adding a seventh one (you guessed, it, violet) by combining the first (red) with the sixth (indigo) in order to connect the arc together in a continuous circle.
And finally, he labeled his seven-color wheel with the letters A through G. Why did he choose these letters? He wanted them to match the seven notes in the western musical scale. I think he felt a connection between colors and music … as many people do. The connection is kind of magical (one could even say it’s a Rainbow Connection, especially if one were Kermit the Frog).
Here’s Newton’s illustration of the Color Wheel. Note that the sections are unevenly spaced, corresponding to the way notes on the musical scale are arranged (full steps after A, C, D, F, and G, but only half-steps after B and E).
Speaking of colors, here are some colorful autumn scenes, taken just last month. Click each one for a bigger burst of color.
Since Newton’s birthday is December 25, I’m going to go out on a limb (an apple tree limb, of course), and guess that his favorite colors were red and green. Mine are yellow and indigo. What are your favorite colors?
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