Schrödinger's Theatre - Sixty Symbols

From a channel Lumen includes in full: Sixty Symbols films physicists and astronomers at the University of Nottingham explaining physics concepts, symbols, new results and Nobel-winning work in their own words; produced by Brady Haran.

A 9-minute video from Sixty Symbols's catalogue; the title names its topic.

Video by Sixty Symbols, played through YouTube's embedded player.