Monday 21 November 2011

November 21: Einstein's equation E = mc² (1905)

E = mc² statue in Berlin, Germany
Albert Einstein's seminal paper Does the inertia of the body depend upon its energy content? was published in the journal Annalen der Physik, which was one of the four Annus Mirabilis papers. This paper led to the famous mass-energy equivalence equation  E = mc². This equation implies that energy of a body at rest (E) equals its mass (m) times the speed of light (c) squared. It can be used to calculate how much mass goes along with the the removed energy, in fact, it was used to predict how much energy will be released or consumed by nuclear reactions.

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