Caption: Hand writing E=mc2 on a blackboard. This equation was formulated by the German physicist Albert Einstein in 1905. It shows the equivalence of mass (m) and energy (E), and that they are related by the speed of light (c) squared. As the speed of light squared is a very large number, it shows that even a small mass has a very large amount of intrinsic energy, even when it is not moving. This explains, amongst other things, why a relatively small nuclear bomb releases such an enormous amount of energy.

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Keywords: 1900s, 1905, 20th century, albert einstein, annus mirabilis, blackboard, bomb, chalk, discovery, education, educational, einstein, energy, equation, equivalent, explanation, famous, hand, invariant, law, mass, mass-energy equivalence, mathematical, mathematics, natural, nuclear, physical, physics, power, red, relativity, rest mass, science, scientific, special relativity, speed of light, teacher, teaching, theory, writing

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Hand writing Einstein's equation

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