@neiltyson @cmirand4 But isnt the speed of light relative as a function of gravity?
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@neiltyson@cmirand4 to clarify (we cheat) the length of a meter is defined in terms of C and the time standard, also wikipedia works hereThanks. Twitter will use this to make your timeline better. UndoUndo
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@neiltyson@cmirand4 Speed of light has been / can be measured cf Michelson expts and Lene Hau's workThanks. Twitter will use this to make your timeline better. UndoUndo
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Hmm RT
@neiltyson .@cmirand4: Why doesn't the speed of light have an uncertainty? // It's defined, not measured. See: http://bit.ly/W7tlVFThanks. Twitter will use this to make your timeline better. UndoUndo
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@neiltyson had no idea pi had such an old history, or that we had tracked it. As for constants, with how little time we have been who knowsThanks. Twitter will use this to make your timeline better. UndoUndo
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@neiltyson I would enjoy an essay on Einstein and the background of the constant of light. Your article on "...Being Constant" was great. TYThanks. Twitter will use this to make your timeline better. UndoUndo
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@neiltyson I'm going to be stalking the Hayden planetarium tomorrow. I will be stealthy.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@neiltyson Thank you for giving me the base for next week's discussion with my doc students: the relationship b/n social science & physics.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@neiltyson great read but my ? is Can we ever really know the circumference AND the radius of a circle if exact value of pi is unknown?Thanks. Twitter will use this to make your timeline better. UndoUndo
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@neiltyson@cmirand4 Thanks for the article - too bad it says of the speed of light only "a subject worthy of its own essay at another time"Thanks. Twitter will use this to make your timeline better. UndoUndo
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@neiltyson I love how you turn physics into poetry.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@neiltyson@cmirand4 Not entirely true. See http://en.wikipedia.org/wiki/Speed_of_light#Increased_accuracy_of_c_and_redefinition_of_the_metre …: c = 299,792,456.2±1.1 m/s. However, it's 299,792,458 m/s by convention.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@neiltyson@cmirand4 miles, I've always wondered the speed of gravity. Perhaps it has uncertainty also.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@neiltyson@cmirand4 great essay, but I don't think it's the right one to answer the question.Thanks. Twitter will use this to make your timeline better. UndoUndo
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