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Politics : PRESIDENT GEORGE W. BUSH -- Ignore unavailable to you. Want to Upgrade?

To: goldworldnet who wrote (285217)	8/9/2002 10:18:33 AM
From: TigerPaw	Read Replies (1) \| Respond to of 769670

To get nitpicky, which physicits like to do, Einstein did not insist that the speed of light be constant through the eons. It only has to mark an upper limit measurable from any relative observation. The article doesn't even complete the thought, which is the "speed of light in a vaccum" since it was well known to Newton that light could change speeds in different mediums. The limit that Einstein placed on speed was predicated on the assumption of cause and effect. If anything could travel faster than light it could have an effect on its surroundings before the information about the cause arrived. The E=MC2 equation just establishes a relationship between the energy required to bring matter to a given speed with the implication that if brought to the speed of light the matter would be entirely transformed into energy. If light is a bit slower than the energy required is a little bit less, but it doesn't change the form and nature of the equation.