¡Intenta imaginar el tamaño de un átomo!

In one of his books, Erwin Schrödinger recounts a thought experiment that Lord Kelvin devised to help us visualize the size of atoms. He also discusses the foundational experiment of quantum mechanics (the double-slit experiment). This experiment, in the early days of quantum mechanics, was an idealized experiment (a thought experiment) used to explain the collapse of the wave function. Today, the double-slit experiment in its "complete" version (that is, including the collapse of the wave function that reveals wave-particle duality) has been performed many times in laboratories and has been perfectly reproducible for decades.