What does Einstein's 'E=mc2' equation mean?
Albert Einstein's mass-energy equivalence equation 'E=mc2' says that energy and matter are interchangeable. In the equation, 'E' represents energy, 'm' mass, and 'c' the speed of light in vacuum which is 3 lakh kms per second. A body of rest mass 'm' possesses mc2 of rest energy, which explains why nuclear fission of few grams of uranium releases tremendous energy.