# Lamb, Willis Eugene, Jr. (1913–2008)

Willis Lamb was an American physicist who shared with Polykarp Kusch the 1955 Nobel Prize in Physics for his examination of the hydrogen
spectrum. He devised new techniques whereby he was able to show that
the position of certain lines differed from the theoretical predictions,
thus necessitating a revision of atomic theory. The **Lamb shift**,
which is named after him, provided the first sign that a theoretical approach
called renormalization could remove the mathematical infinities that were
plaguing quantum mechanics at the time. He also developed microwave techniques
for examining the helium spectrum.