Yes, electrons can indeed be used as waves in a double slit experiment. This is a fundamental principle of quantum mechanics known as wave-particle duality. According to wave-particle duality, particles such as electrons can exhibit both wave-like and particle-like behavior, depending on the experimental setup and observation method.
In the double slit experiment, a beam of electrons is passed through two closely spaced slits, creating an interference pattern on a screen placed behind the slits. This pattern arises due to the wave nature of electrons. When the electrons pass through the slits, they diffract and interfere with each other, resulting in regions of constructive and destructive interference.
The resulting pattern on the screen demonstrates wave-like behavior, with alternating bright and dark fringes. This interference pattern is similar to what is observed when light waves pass through a double slit, indicating the wave-like nature of electrons.
It's worth noting that the double slit experiment has been performed not only with electrons but with other particles as well, such as photons (particles of light), neutrons, and even large molecules like buckyballs. These experiments consistently demonstrate the wave-particle duality of matter.