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E=mc ^{2}
This is the relativity theory of Einstein.
Hope it helps you..!
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plzz mark it as the best i need best ans..
xD E=mc^2 as easy as that , but i don't know why a primary physics student wants to learn about it?
The  theory  explains the behavior in space and time, it can be used to predict everything from the existence of black holes, to light bending due to gravity,  to the behavior of the planet Mercury in it's orbit.
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