Re: So... Lerentz Contractions are *physical* not observered?


"jem" <xxx@xxxxxxx> wrote in message news:O2sii.3834$Zt6.53@xxxxxxxxxxxxxxx
kenseto wrote:

"Tom Roberts" <tjroberts137@xxxxxxxxxxxxx> wrote in message
news:1Sjii.16683$2v1.8259@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx

mgconsolidated@xxxxxxxxxxxxxx wrote:

Can anyone provide / point to a definitive answer on whether Lorentz
contractions are physical or an observered effect.

This depends on what you mean by those words.

Here's an analogy: a ladder will fit through a doorway if it is oriented
correctly, and won't fit if it is oriented differently -- is this
difference "physical"? -- after all neither the length of the ladder nor
the width of the doorway change in any way. This is an example of
GEOMETRICAL PROJECTION -- if the projection of the ladder's length onto
the doorway's width is small then it fits, and if that projection is
large then it won't; this depends on their relative orientation.


Instead of the ladder we have a circular metal plate with a diameter of
Dp
and the door in the barn is also circular with a diameter of Db. Dp is
lager
than Db. Now Dp is accelerated to a relativistic speed will it fit
through
the smaller Db door???

Does IRT have an answer, Seto?

Yes IRT has an answer as follows:
Dp will not fit through the smaller Db door.
Why?
In IRT the physical length of an object remains the same in all frames of
reference.... even as viewed by different observers. In IRT the light path
length of an object is different in different frames. The higher is the
state of absolute motion of an object the longer is it's light path length.
An IRT observer does not know if the rod moving wrt him is in a higher or
lower state of absolute motion. That's why IRT has two sets of equations for
the light path length of a moving rod. When the moving rod is in a higher
state of absolute motion than the IRT observer then its light path length is
longer than the light path length of the IRT observer's rod by a factor of
(gamma). When the moving rod is in a lower state of absolute motion than the
IRT observer then its light path length is shorter than the light path
length of the IRT observer's rod by a factor of (1/gamma).....BTW this is
the formula for the SR length contraction.

Ken Seto


.

Relevant Pages

  • Re: So... Lerentz Contractions are *physical* not observered?
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  • Re: So... Lerentz Contractions are *physical* not observered?
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