"Spaceman" wrote in message
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"OG" wrote in message
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| "Spaceman" wrote in message
| ...
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| "OG" wrote in message
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| | "Spaceman" wrote in message
| | news | |
| | "OG" wrote in message
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| | | So (A) had to move from 0 to first line to measure it
| | | (B) also moved from 0 to first line to measure it - but (B)
moved
| | faster.
| | |
| | | Why is (A)s measurement 'right' whereas (B)'s measurement is
'wrong'
| ?
| |
| | (A) used a physical device to measure it.
| | (B) could not do such at the speed it was doing.
| |
| |
| | I thought we were doing a gerdanken? Think again and try and come up
| with
| a
| | better answer.
|
| Why?
| I like my answer.
| if you don't like it,
| you come up with a better answer.
|
| This is a Gerdanken, (B) has just physically measured it at .5c .
|
| Why is (B)'s answer 'wrong' when (A)s is 'right' ?

It is not wrong, it matched (A)'s physical measurement.
If it did not match, something is wrong with the abstracted
measurement method.

Nope, (B) physically measured it and it was definitely 0.87 miles.

Now why is (A)s right and (B)s wrong?