The double-slit experiment is taught today in most high school physics classes as a simple way to illustrate the fundamental principle of quantum mechanics: that all physical objects, including light, are simultaneously particles and waves.

MIT physicists have performed an idealized version of one of the most famous experiments in quantum physics. Their findings demonstrate, with atomic-level precision, the dual yet evasive nature of light. They also happen to confirm that Albert Einstein was wrong about this particular quantum scenario.

They demonstrated what Einstein got wrong. Whenever an atom is "rustled" by a passing photon, the wave interference is diminished.
https://www.sciencedaily.com/releases/2025/07/250729044705.htm

https://en.wikipedia.org/wiki/Double-slit_experiment#/media/File:Doubleslit3Dspectrum.gif