Handwritten example of famous Einstein equation fetches 1.2 million dollars

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Handwritten Example Of Famous Einstein Equation Fetches 1.2 Million Dollars
Albert Einstein 1921, © PA Archive/PA Images
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By Associated Press Reporter

A letter penned by Albert Einstein in which he writes out his famous E=mc2 equation has sold at auction for more than 1.2 million dollars (£850,000), about three times more than it was expected to get.

Archivists at the Einstein Papers Project at the California Institute of Technology and the Hebrew University of Jerusalem say there are only three other known examples of Einstein writing the world-changing equation in his own hand.

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This fourth example – the only one in a private collection – only became public recently, according to Boston-based RR Auction, which had expected it to sell for about 400,000 dollars (£283,000).


“It’s an important letter from both a holographic and a physics point of view,” Bobby Livingston, executive vice president at RR Auction said, calling the equation the most famous in the world.

The equation — energy equals mass times the speed of light squared — changed physics by demonstrating that time was not absolute and that mass and energy were equivalent.

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The one-page handwritten letter in German to Polish American physicist Ludwik Silberstein is dated October 26, 1946.

Mr Silberstein was a well-known critic and challenger to some of Einstein’s theories.

“Your question can be answered from the E=mc2 formula, without any erudition,” Einstein wrote in the letter written on Princeton University letterhead, according to a translation provided by RR Auction.

The letter was part of Silberstein’s personal archives, which were sold by his descendants.

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The buyer was identified by RR only as an anonymous document collector.

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