Was watching an old documentary about Einstein while riding BART today... (there aren't too many videos I can choose from online that I can convert to put onto my portable video player)
So here's what I learned:
Einstein accepted the fact that speed of light was a constant, so how could two observers see the same speed? well if speed = d/t, and d and speed are const, than time must be a variable.
Also, this means that time is not absolute - ie: if an observer sees two lightning strikes around him, vs a moving observer at the same point - they will not agree on the time of those lightning strikes (since one was moving).
Also, since E = mc^2, then mass has energy and energy has mass. The sun sends out 4.5 pounds of light at us per day.
Monday, July 10, 2006
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