Chart of Electromagnetic Radiations
Awesome so far; I’m still investigating all the nooks and crannies. I think this is getting printed out and put up on the wall at work.
From 1944, edited by Compton, and made by the W. M. Welch Scientific Co. (before he was promoted to be Sargent-Welch)
Very cool!!! Thanks for sharing!
Measures of Time 9.5*10^17 seconds = 1 light year ???
I guess it made sense then