“Barney” purple

“Barney” purple

A few days ago I was asked on Quora if I could explain why Barney, the talking dinosaur from the kid’s TV show, is described as being “purple”.  I prepared the graphic below as my response. Possibly a bit over-the-top, but, hey, I sympathize with...

Why is air colorless?

I received this question today from Quora. My answer: The experience of color is part of our sensory system – it is a subset of vision. We experience colors not unlike the way we experience sounds, smells, and tastes – in our brains.   Air doesn’t...

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