3. Particle-matter interactions

This interaction is demonstrated by the Young's slit experiment in photonic optics. When two parallel, thin, closely-spaced slits are illuminated coherently (i.e. with a clearly defined phase) by the same point source, we observe the formation of broad, alternately bright and dark bangs on a screen. Equivalent interference is obtained with all particles (electrons, neutrons, ions, etc.). It has been shown, for example, that each electron (its associated wave) interferes with itself (with itself) , from which we can deduce that the result of these interferences obtained with many successive electrons is the sum of the probabilities...