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 of each event and therefore the sum of independent processes. If the...