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Also, what is E equals MC squared?
E = mc2. It's the world's most famous equation, but what does it really mean? "Energy equals mass times the speed of light squared." On the most basic level, the equation says that energy and mass (matter) are interchangeable; they are different forms of the same thing.
Furthermore, why is E mc2 wrong? The only wrong thing is the belief that Einstein invented E=mc^2. The equation, in different form, existed for about a year before Einstein published his first paper. The equation is derived from and contained in Henri Poincaré's thought experiment equation, M=S/c^2. for the momentum of radiation.
Hereof, does E really equal mc2?
Einstein's most famous equation, E = mc^2, falls into that category, stating that the energy content of a massive body is equal to that object's mass times the speed of light squared.
Why is E mc2 so famous?
Einstein's greatest equation, E = mc2, is a triumph of the power and simplicity of fundamental physics. Matter has an inherent amount of energy to it, mass can be converted (under the right conditions) to pure energy, and energy can be used to create massive objects that did not exist previously.