Yes, the double slit experiment has been validated and its results have been reproduced numerous times in various experiments. The experiment is a fundamental demonstration of the wave-particle duality of matter and the principles of quantum mechanics.
In the double slit experiment, a beam of particles, such as electrons or photons, is directed towards a barrier with two slits. When the particles pass through the slits and hit a screen behind the barrier, an interference pattern emerges, indicating that the particles exhibit wave-like behavior. This pattern consists of alternating light and dark bands, similar to the pattern produced by water waves passing through two slits.
The experiment has been conducted with different types of particles, including electrons, photons, and even large molecules like fullerenes. In each case, the results consistently demonstrate the wave-like behavior of particles.
The validation of the double slit experiment has significant implications for our understanding of the nature of particles and the principles of quantum mechanics. It supports the idea that particles can exhibit both wave-like and particle-like properties, depending on how they are observed or measured.