A pretty good entry for this year’s Flame Challenge.
We don’t have spectrometers inside our eyes to measure wavelengths; instead, we see colors of light thanks to special cells in the back of our eyes that send a signal to our brain when they detect light.
I think Chad’s entry is better in breadth, depth and presentation than the winner from last year, but it’s also true that I thought last year’s question (What is time) was misguided. This year we’re back to asking about processes that can be broken down and explained.