In a double slit experiment, there is a screen coated with a special material such that a tiny dot appears when a photon collides with it. You have a light source that can emit individual photons, one at a time. A single photon is emitted from the source, passes through the double slit, and strikes the screen, leaving a dot on the screen. As more photons are emitted, making more dots on the screen, you notice that the dots appear in a pattern.

What pattern do the dots make?

A. The dots appear in a single densely populated region
B. The dots are distributed in a series of alternating densely populated and sparsely populated fringes, consistent with the interference pattern made by a wave
C. The dots are randomly distributed over the screen, forming no discernible pattern
D. The dots appear in two densely populated regions, corresponding to the two slits.

B. The dots are distributed in a series of alternating densely populated and sparsely populated fringes, consistent with the interference pattern made by a wave

Explanation:

Different of classical mechanics, in quantum mechanics the probability distribution in a double slits experiment presents an interference pattern like waves. In this context, the photons (particles of light) present a kind of correlation between them, that makes they present a distribution in the screen as an interference pattern. It is not possible to demostrate this fact mathematically from another physic principle, it simply a fact of the nature of the quantum mechanics. Hence, the dots are distributed in an interference pattern.

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