Einstein's Theory of Relativity Explained (Infographic)
The theories of relativity by Albert Einstein revolutionized how the world thinks about space, time, mass, energy and gravity. FULL STORY: General Relativity at 100: Einstein's Famous Theory Has Aged Well Prior to Einstein, the laws of Isaac Newton were used to understand the physics of motion. In 1687, Newton wrote that gravity affects everything in the universe. The same force of gravity that pulled an apple down from a tree kept the Earth in motion around the sun. But Newton never puzzled out the source of gravity. Reference: Einstein's Theory of General Relativity Philosopher David Hume's 1738 "A Treatise of Human Nature" was a big influence on Einstein's thinking about space and time. "It is very well possible that without these philosophical studies I would not have arrived at the solution," Einstein wrote. In 1905, Albert Einstein based a new theory on two principles. As a result of these principles, Einstein deduced that there is no fixed frame of reference in the universe.
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