What did the double-slit interference experiment prove?

The interference of light is a unique feature of fluctuation. If light is really a wave, it must be observed. 180 1 year, British physicist Thomas Young (1773-1829) successfully observed the phenomenon of light interference in the laboratory.

When two or more light waves meet in space, they will always strengthen in some areas and weaken in others, forming a stable distribution of strength and weakness, which proves that light has fluctuation.

Extended data

When monochromatic light passes through double slits, light and dark interference fringes are produced on the screen.

When the distance difference between a certain place on the screen and two slits is even multiple of half wavelength, the peaks of the two waves overlap and the valleys overlap to form bright stripes.

When the distance difference between a certain place on the screen and two slits is odd times of half wavelength, the peaks and valleys overlap each other at these places, and the amplitudes of light waves cancel each other out, resulting in dark stripes.

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