Computer clocks and Relativity
Philip Miller Tate
Philmt59 at aol.com
Sun Feb 28 07:29:10 CST 2010
On 28 Feb 2010, at 03:27, Richard Barth wrote:
> At 07:15 PM 2/27/2010, andre kesteloot wrote:
>> An acquaintance of mine owns a laptop running Windows XP.
>> He lives in Maryland, hence within same time-zone as mine in
>> The little icon located at bottom right of his screen indicates
>> the actual real current time.
>> If he sends out an e-mail message, however, the msg will be dated
>> A msg that I send him at 1600H is marked, when he receives it, as
>> being dated earlier in time, i.e., at 15:34H, about 1/2 hour
>> earlier than real time
>> If he writes to me at 16:00H, it will be marked on my computer as
>> having been sent at 16:37H, or about 1/2 later than real time
>> Is this a --so far unexplained-- effect of special relativity ?
> No, it means that Maryland is at least a half hour ahead of
> Virginia. :-)
No, it means that one or both of them has a processor running at a
significant fraction of the velocity of light. And a USB tachyon drive.
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