Re: Direct observation of length contraction

Dear Dono:

"Dono" <sa_ge@xxxxxxxxxxx> wrote in message
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On Jan 29, 6:34 pm, "N:dlzc D:aol T:com \(dlzc\)"
<dl...@xxxxxxx>
wrote:
Dear Dono:

"Dono" <sa...@xxxxxxxxxxx> wrote in message

news:d88cc742-f703-4ba7-b9c0-c7e9097ba984@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

On Jan 29, 6:16 pm, "N:dlzc D:aol T:com \(dlzc\)"
<dl...@xxxxxxx>
wrote:
Dear Dono:

"Dono" <sa...@xxxxxxxxxxx> wrote in message

news:7626d732-81e0-4e16-bc0e-64d023501a36@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

The FAQ claims that there are no direct tests of
length contraction. I may have found one:

http://prola.aps.org/abstract/PRL/v75/i7/p1372_1

http://physics.weber.edu/schroeder/mrr/MRRtalk.html
... nothing to measure in magnetism *except* length
contraction, because the charge is known...

This is a very bad article. Hans de Vries completely
rewrote this article . He does not use length contraction
in his explanation . See here:

http://chip-architect.com/news/2007_02_27_Magnetism_as_a_Relativistic...

Click on the pdf.

Yes, he says it is length contraction. "A relativistic
side effect..." What he is doing is generalizing the
mathematics from what Purcell did.

Hans' demonstration does not use length contraction,
please read carefully.

Read again. Started with a particle with a velocity, and got a
net charge density change. Length contraction. Since length
contraction and time dilation are two sides of the same coin, he
also arrives (explicity) at time dilation.

Choose your weapons, but they are all the same.

David A. Smith


.

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