Quan­tum Physics Made Rel­a­tively Easy:

In 1999, leg­endary the­o­ret­i­cal physi­cist Hans Bethe deliv­ered three lec­tures on quan­tum the­ory to his neigh­bors at the Kendal of Ithaca retire­ment com­mu­nity (near Cor­nell Uni­ver­sity). Given by Pro­fes­sor Bethe at age 93, the lec­tures are pre­sented here as Quick­Time videos syn­chro­nized with slides of his talk­ing points and archival material.

Free­man Dyson called Bethe the “supreme prob­lem solver of the 20th cen­tury.” Com­ing from Dyson, that’s praise indeed.