# The Paradox of the Double Slit Experiment

John von Neumann states a paradox. Why would measuring something distort the smooth Schrödinger wave and cause it to collapse for no mathematical reason?

This paradox is embedded in the double-slit experiment. When a dot appears on the target screen, how does this cause the Schrödinger wave to collapse anywhere else faster than the speed of light?

Von Neumann did not follow his mathematics to its logical conclusion. If the wavefunction collapse irreversibly changes reality, the math tells us the timing and location of that event cannot be on the target screen. An event that fits this description only happens once: at the gun. A gunshot can change history. We propose a new mathematics of Schrodinger waves.

Zero energy waves from the target screen pass backwards through the double slit and hit the weapon before it is fired.

A particle randomly chooses one to follow backwards. The particle's wave selection is proportional to the square of the amplitude of that wave in the gun, determined by the overlap of the two waves traveling backwards through the two slits.

Why follow the zero energy wave? Because Schrodinger waves transmit amplitudes that determine the probability density of that path.

## Summary of Young's Experiment

Young's experiment Also known as the double-slit experiment, it shows that light exhibits wave properties. The photoelectric effect shows that light exhibits particle properties as well as wave properties. In the simple version of the experiment, a coherent light source, such as a laser beam, illuminates a thin plate with two parallel slits, and the light passing through the slit is observed on a screen behind the plate.

The wave nature of light allows light waves to interfere with both slits and create bands of light and dark on the screen, which would not be expected if the light was purely particulate. But light always appears to be absorbed on the screen, as if it were composed of particles or photons.

This demonstrates the principle known as wave-particle duality.

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