Abstract

Profound revolutionary changes occur periodically in the historical development of science. They take place when the system of scientific views previously in existence breaks down, and a new system adequate to the higher level of scientific knowledge takes shape. The discoveries of Copernicus, Lavoisier, Darwin, and many others have opened such periods of change in natural science. In modern physics, the discoveries of radium and the electron, the emergence of the theory of relativity and of quantum mechanics, have brought about a revolution which has not yet run its course