From single particle experiments to tabletop setups to astrophysical phenomena, all observers everywhere in the Universe observe the speed of light to be constant in all situations. Image credit: United States Air Force.

What’s so special about special relativity?

Einstein’s first great revolution happened way back in 1905. It still puzzles many amateurs and professionals alike even today.

Published in

Starts With A Bang!

5 min readOct 18, 2016

“Each ray of light moves in the coordinate system ‘at rest’ with the definite, constant velocity V independent of whether this ray of light is emitted by a body at rest or a body…

What’s so special about special relativity?

Einstein’s first great revolution happened way back in 1905. It still puzzles many amateurs and professionals alike even today.

Written by Ethan Siegel