Introduction to Quantum Physics Quantum physics is a branch of physics that deals with the study of the behavior of matter and energy at a very small scale. It is a fundamental theory that explains the behavior of subatomic particles such as electrons, protons, and neutrons, which make up the building blocks of matter. Unlike classical physics, which deals with the laws of motion and the behavior of macroscopic objects, quantum physics deals with the laws of probability and the behavior of particles at the quantum level. Historical Development of Quantum Physics The development of quantum physics can be traced back to the late 19th century when scientists such as Max Planck and Albert Einstein were studying the behavior of light and electromagnetic radiation. In 1900, Planck proposed that the energy of electromagnetic radiation is quantized, meaning that it can only exist in discrete packets of energy known as quanta. This idea was revolutionary at the time and formed the basis f...