Cornstalk Red Barn Blue Sky
by Beth Ferris Sale
Title
Cornstalk Red Barn Blue Sky
Artist
Beth Ferris Sale
Medium
Photograph - Photography
Description
Have you ever noticed that almost every barn you have ever seen is red? There’s a reason for that, and it has to do with the chemistry of dying stars. Seriously.
The simple answer to why barns are painted red is because red paint is cheap. The cheapest paint there is, in fact. But the reason it’s so cheap? Well, that’s the interesting part.
Red ochre—Fe2O3—is a simple compound of iron and oxygen that absorbs yellow, green and blue light and appears red. It’s what makes red paint red. It’s really cheap because it’s really plentiful. And it’s really plentiful because of nuclear fusion in dying stars.
Uploaded
September 3rd, 2013
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