Photons, electrons, atoms, molecules, and so on all have microscopic properties that can be explained by the principles of quantum mechanics. It deals with microscopic particles. It is based on the Schrodinger equation.
There are numerous ways in which Einstein altered the world, and his ideas have influenced how humans see and interact with the cosmos. He is widely regarded as one of the twentieth century's most significant scientists. His research continues to aid astronomers in their studies of everything from gravitational waves to Mercury's orbit.