Science trivia of the day

[andygates]

Get above the atmosphere, where you're exposed to cosmic particles.  Close your eyes.  Those blue flashes you see are Cherenkov radiation - the photonic equivalent of a sonic boom - caused by cosmic particles moving through the liquid in your eyeballs at a speed greater than the speed of light in your eyeball. 

Comments

[andygates.livejournal.com]

And the speed of light in an eyeball is about .75c