Why is the Sky Blue?

I ran my cursor over the cartoon and now my mind is broken!

Feynman recounted another good one upperclassmen would use on freshmen physics students: When you look at words in a mirror, how come they're reversed left to right but not top to bottom? What's special about the horizontal axis?

Test it – sideway, upside down, head on the side, standing on your head.

It is ALWAYS reversed!

NOTE:- you should ALWAYS run your cursor over a Randall Cartoon!

from xkcd, of course

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