ASTRON 2B03 Lecture 12: Astron 2BO3 Lecture 12 Consequences
18 Mar 2016
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What happens to lengths when you travel at the speed of light. Objects appear shorter if they are moving at high speeds. Appear shorter along the direction of motion than the same object seen at rest. Length of a moving object appears shorter by a factor of 1/y (y = gamma) E = mc2 - associated with all mass there is an energy e. Moving mass m is bigger than rest mass mo. Mass would be in nite if velocity = speed of light. But it would take in nite energy to get it up to the speed of light. The relationship between energy and mass in life: mass in the sun is converted to energy through a fusion reaction creating helium from hydrogen. Mass and energy are both but different manifestations of the same thing -- a somewhat unfamiliar conception for the average mind.
