ABSTRACT
Quantum mechanics was all but completed in 1926. But it only compounded – entrenched – a problem that had been obvious for years: wave-particle duality. For a simple example, consider Young’s two-slit experiment, in which monochromatic light, incident on two narrow, parallel slits, subsequently produces an interference pattern on a distant screen (in this case, closely spaced bands of light and dark parallel to the slits). If either of the slits is closed, the pattern is lost. If one or other slit is closed sporadically and randomly, so that only one is open at any one time, the pattern is lost.
