Does µ represent the coefficient of friction? The chemical potential? Or maybe the magnetic moment? Some of the choices are far from obvious; the lower-case Greek letter delta, for example, is a ...

IN 1931, the International Union of Pure and Applied Physics appointed a commission ... to deal with the general questions of symbols, units and nomenclature. This Commission submitted its report ...

Do you know what the hell is the Schwarzschild radius? I didn’t have a clue, but now I know that if you compress Earth to an 8mm radius ball, you will get a black hole. My fascination didn’t ...

The Greek alphabet, which has been in use since about 9 B.C., was the first to have letters for each vowel and consonant. In physics, why are only Greek letters such as delta, sigma, gamma, etc.