1,792
edits
Changes
Jump to navigation
Jump to search
Line 75:
Line 75: + +
Talk:Counterexamples to Relativity (view source)
Revision as of 14:27, August 25, 2011
, 14:27, August 25, 2011→Relativity and Electromagnetism: the constant speed of light was an empirical observation
: Relativity assumes that, rather than predicts it. I think relavitist purists would actually say all that is needed is a maximum velocity, whether that is "c" or something else. Many would not be genuinely surprised if velocities slightly faster than ''c'' are ultimately attained, and ''c'' itself may be changing over time.--[[User:Aschlafly|Andy Schlafly]] 02:36, 25 August 2011 (EDT)
: Relativity assumes that, rather than predicts it. I think relavitist purists would actually say all that is needed is a maximum velocity, whether that is "c" or something else. Many would not be genuinely surprised if velocities slightly faster than ''c'' are ultimately attained, and ''c'' itself may be changing over time.--[[User:Aschlafly|Andy Schlafly]] 02:36, 25 August 2011 (EDT)
: Historically, the constant speed of light was an empirical observation, and not just an assumption. Maxwell's theory predicted that electromagnetic waves traveled at the speed of light, and that was observed. It was one of the big reasons for concluding that light was an electromagnetic wave. Experiments like Michelson-Morley (1887) found a constant speed of light. Also, there were astronomical reasons for believing in a constant speed of light. Distances were measured in light-minutes or light-years, and that only makes sense if the speed is constant. Yes, Einstein declared the constant speed of light to be postulate in 1905, but by then it was a well-accepted empirical fact. Going faster than ''c'' or finding a variable ''c'' would now violate so much physics that it would be like finding a perpetual motion machine. [[User:RSchlafly|RSchlafly]] 10:27, 25 August 2011 (EDT)
== Standard kilogrammes? ==
== Standard kilogrammes? ==