Classic Physics Quotes

“A measurement, in this context, is an irreversible act in which uncertainty collapses to certainty. It is the link between the quantum and classical worlds, the point where what might happen - multiple paths, interference patterns, spreading clouds of probability - is replaced by what does happen: some event in the classical world, whether the click of a counter, the activation of an optic nerve in someone's eye, or just the coalescence of a glob of matter triggered by a quantum event.”
― john wheeler, kenneth ford