The ultimate aim in physics is for the establishment of a theory of everything, a theory which aims to unify all the fundamental forces and particles in the universe. Although there is currently no widely accepted theory of everything, theoretical physicists have developed competing frameworks that aim to be a theory of everything. They include:…

The concept of local realism, which holds that physical processes occurring in one location cannot be directly affected by processes in another location, was a fundamental principle of classical physics. However, the principles of quantum mechanics indicate that the universe may not be locally real Quantum mechanics holds that the properties of particles, such as…

There are many methods used to measure the speed of light. One is to measure the time light rays require to hit a mirror at a known distance and back. This is how the Fizeau–Foucault apparatus works, which was developed by Hippolyte Fizeau and Léon Foucault. Fizeau’s setup consists of a beam of light directed…

The double-slit experiment is a famous physics experiment that demonstrates the wave-particle duality of matter, which suggests that particles like electrons can exhibit both wave-like and particle-like behavior depending on how they are observed. The double-slit experiment shows that the behavior of particles like electrons are dependent on the way they are being observed, and…