# Enrico Fermi's photo and the wrong fine structure constant

This photo about the Italian supreme physicist Enrico Fermi is rather famous.

Yet nobody ever questioned, as far as I know, the wrongness of the fine structure constant written on it.

So I am asking you this: why is the fine structure constant written in a wrong way? And what is he drawing?

• As a counterpoint, when I was a student, every time a professor showed this photo, they would point out that the fine-structure constant was written incorrectly. – rob Apr 13 '18 at 15:00
• Ahhh as I thought I couldn't be the first one xD I just wonder why it was wrong written. I don't think Fermi just wanted to be photographed just for showman manias :D – Les Adieux Apr 13 '18 at 15:02

He has exchanged $e$ with $h/(2π)$ symbols, as they say in the link , people do such substitutions, more so with age. One should check again formulae as a matter of course.