Hansch, Theodor Wolfgang, hehnsh, TAY oh dohr VAWLF gahng (1941-...), a German physicist, shared the 2005 Noble Prize in physics with the American physicists John L. Hall and Roy J. Glauber. Hansch and Hall won the prize for developing improved methods of using lasers to make measurements. Glauber won for devising a mathematical model of light used in a branch of physics called quantum mechanics.