It further became clear when Einstein examined the photoelectric effect, which is the ejection of electrons from certain surfaces e.g. metal surface. In 1906, he concluded that energy is in form of quanta. They occur distinctly in multiples of the function Ä§v. Ä§ is the planks constant. It is the reduced constant. In 1924, Bose proposed that quanta exist in different states. At around the same time, Louis de Broglie noted that particles are also wave-like. They have the duality of light. In 1926, SchrÃ¶dinger gave an equation for the hydrogen atom. This was the genesis of wave mechanics. A complete derivation of Plankâ€™s constant was in 1929. The principle of uncertainty explains why it is hard to get the position of a particle and at the same time obtain its momentum. Dx Dp â‰¥ = h/2Ï€ where Dx shows the uncertainty in position and Dp represents uncertainty in momentum. Bohr confirmed that the space-time coordinates match. This was in 1927. Von Neumann put quantum theory into operator algebra in 1932.
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