Einstein's famous mass-energy equation is E=mc^2, where E represents energy, m represents mass, and c represents the speed of light. An important result of the theory of relativity is the relationship between mass and energy. Mass and energy are not interchangeable, which is based on the special theory of relativity. In 1915, he proposed the general theory of relativity. Because in classical mechanics, mass and energy are independent and unrelated, but in relativistic mechanics, energy and mass are interchangeable. Einstein's paper "An Inspiring View of the Generation and Transformation of Light" published in June 1905 explained the nature of light, which also won him the Nobel Prize in Physics in 1921.

Einstein's mass-energy equation

Energy: E = mc²

E = Energy

m = mass

c = speed of light