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visits member for 2 years, 8 months
seen Oct 29 at 11:41

Hello. Would you like a hot beverage?


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comment Is it possible to lift yourself off from the ground?
@ChrisGerig True enough, but this is just a bit more expressive since the OP didn't seem convinced.
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answered Is it possible to lift yourself off from the ground?
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revised How can time be relative?
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comment How can time be relative?
Those are modern facts, in the time of Einstein, it was measured at around $186350$ miles per second, a little over today's precise measurement. Today's iterations of the MichelsonMorley experiment give a million times more precise results. What was important for Einstein is the fact that all the evidence pointed towards the constancy of light. The specific value isn't even important, you could express velocity as a percentage of the speed of light for the sake of argument and it would still work. But yes, it's not entirely historically accurate, it would take a book to write that out.
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comment How can time be relative?
No problem, enjoy physics!
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revised How can time be relative?
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comment How can time be relative?
I've written an addendum in an attempt to explain, hope it helps.
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awarded  Teacher
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