Monday, 2 January 2012

Inconstant Constants

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Some things never change. physicists call them the constants of nature. Such quantities as the velocity of light, c , Newton’s constant of gravitation, G , and the mass of the electron, m e , are assumed to be the same at all places and times in the universe. They form the scaffolding around which the theories of physics are erected, and they define the fabric of our universe. Physics has progressed by making ever more accurate measurements of their values.

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