Re: How to built a universal clock

From: Ken Seto (kenseto_at_erinet.com)
Date: 11/02/04


Date: 2 Nov 2004 06:57:00 -0800

shevek4@yahoo.com (shevek) wrote in message news:<c2ee115b.0410311215.6688a438@posting.google.com>...
> kenseto@erinet.com (Ken Seto) wrote in message news:<75dd81d3.0410300734.1c2271cc@posting.google.com>...
> > Definition for a universal clock: A devise that keeps the same rate of
> > passage of universal time in all frames of reference.
>
>
> Let me guess. One second per second?

No, your guess is wrong. A clock second will represent a specific
interval of universal time in the rest frame of the clock. When that
same clock changes its state of absolute motion a clock second will
represent a different interval of universal time.
>
> >
> > Assumptions:
> > 1. The physical length of a standard metal rod remains the same in all
> > frames of reference. In other words, the length of a standard metal
> > rod is independent of its state of absolute motion. However, the light
> > path length of the rod is different in a different state of absolute
> > motion.
> >
>
> How can the "light path distance" down the rod be different than its length?

Easy...if the rod is moving (absolute motion) light will need to
travel a longer distance to traverse the length of the rod.
>
> In any case, how is this absolute or universal (rhetorical question of course).

<sigh>....the physical length of the rod remains the same in all
frames of reference therefore it takes the same interval of universal
time for sound to traverse the length of the rod in all frames of
reference. Therefore that interval of time is universal.

Ken Seto



Relevant Pages

  • Re: How to built a universal clock
    ... >> passage of universal time in all frames of reference. ... >> rod is independent of its state of absolute motion. ...
    (sci.physics)
  • Re: How to built a universal clock
    ... >> passage of universal time in all frames of reference. ... >> rod is independent of its state of absolute motion. ...
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  • Re: Some Contradictory Claims in SR:
    ... This suggests that a clock second is an interval of ... > Not unless the m is a universal unit of length in all inertial frames. ... In SR the physical length of a rod remains the same in all frames. ... So you are saying that a clock second is not an interval of universal time ...
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  • Re: How to built a universal clock
    ... >> passage of universal time in all frames of reference. ... A clock second will represent a specific ... interval of universal time in the rest frame of the clock. ...
    (sci.physics)
  • Re: Some Contradictory Claims in SR:
    ... The number you quoted is a conversion ... > that a clock second represents a specfic interval of universal time ... > in different frames. ...
    (sci.physics)