The great American physicist Richard Feynman invented a formulation of quantum mechanics that can be readily understood through a set of simple pictures. In this talk, Feynman\'s somewhat crazy sounding(but correct!) ideas will be illustrated via some simple examples and demonstrations. By the end of this talk you will understand how mirages work, what a lens does, and be able to drop the phrase \'quantum interference\' in casual conversation. Richard Feynman was no ordinary genius. He was a magician who frequently pulled radically original solutions to physics puzzles \'out of the hat.\' He was also an expert safe cracker, bongo player, technology visionary, and a generally curious character. His best-selling autobiography, Surely You\'re Joking, Mr. Feynman!, is fun reading for people of all ages.

About the speaker: Steven Girvin, Distinguished Professor of Physics at Indiana University, received his BS from Bates College in 1971, MS from the University of Maine(1973), and PhD from Princeton(1977). He is a Fellow of the American Physical Society and during 1997-98 was Chair of the ITP Advisory Board. He is interested in the collective \'emergent\' properties which appear in large groups of quantum particles such as the electrons in magnets, superconductors and semiconductors. He is also interested in the engineering barriers standing in the way of building practical quantum computers.