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E = MC2, Relativity Theory, Einstein |
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E = MC2, Relativity Theory, Einstein > Website 
Einstein reported a remarkable consequence of his special theory of relativity: if a body emits a certain amount of energy, then the mass of that body must decrease by a proportionate amount. Meanwhile he wrote a friend, "The relativity principle in connection with the Maxwell equations demands that the mass is a direct measure for the energy contained in bodies; light transfers mass... This thought is amusing and infectious, but I cannot possibly know whether the good Lord does not laugh at it and has led me up the garden path." Einstein and many others were soon convinced of its truth. The relationship is expressed as an equation: E=mc².
The deep connection Einstein discovered between energy and mass is expressed in the equation E=mc² . Here E represents energy, m represents mass, and c² is a very large number, the square of the speed of light. Full confirmation was slow in coming. In Paris in 1933, Irène and Frédéric Joliot-Curie took a photograph showing the conversion of energy into mass. A quantum of light, invisible here, carries energy up from beneath. In the middle it changes into mass -- two freshly created particles which curve away from each other.
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Albert Einstein, Relativity Theory - 1905
Einstein's contributions to physics began in 1905 with three major results: the explanation of Brownian motion in terms of molecules; the explanation of the photoelectric effect in terms of the quantum; and the special theory of relativity that links... |
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The Principle of Relativity, Einstein
The book is a chronology of the development of the theory of Relativity. Starting with Lorentz' papers on Michelson's interference experiment and electomagnetic phenomena in moving frames of reference, the book follows the rapid development of the su... |
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Who • What • When • Where • Which |
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