Albert Einstein and his Greatest Work: General Relativity E=mc²

The idea of relativity had been studied almost three centuries earlier by Galileo, when he stated the principle of relativity in 1632 (that the fundamental laws of physics are the same for all bodies in uniform motion). Later in the 17th Century, Sir Isaac Newton also took the principle of relativity for granted, asserting that if his famous laws of motion held in one inertial frame, then they also held in a reference frame moving at a constant velocity relative to the first frame.

As we will see, Einstein’s theories are somewhat more involved, even if his starting point was in many respects the same. His ground-breaking theories take into account the speed of light, the structure of space-time and the equivalence of acceleration and gravity. They have led to some remarkable consequences, including the dilation of time, the contraction of length, mass-energy equivalence and the bending of light, as well as the prediction of the existence of black holes, wormholes and the “birth” of the universe in a Big Bang.

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