Did you know: The colors of fire are a big shining clue that light is made of discrete packets, or quanta? At least historically, the color of light emitted by a hot item led to the conclusion that light must be like a particle as well as like a wave. Via a few brains, including Einstein's. Now we can look at a star's color and tell its temperature. If you'd like to know how it all fits together (with stick figures to illustrate), here's a video of it, which you can be sure will find its way into my next physical chemistry course:
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