Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > sci.physics.relativity > #627928

Re: Ehrenfest paradox

Show all headers | View raw

Am 23.01.2024 um 17:51 schrieb Volney:
> On 1/23/2024 3:53 AM, Thomas Heger wrote:
>> Am 22.01.2024 um 18:40 schrieb Volney:
>>
>>>>> Since the light goes from A to B and back to A, everything happens in
>>>>> one dimension. Define the X axis as along the AB axis and the Y and Z
>>>>> axes can be ignored as irrelevant.
>>>>
>>>> I know what you mean, of course.
>>>>
>>>> But you're nevertheless wrong, because 'everything happens in  one
>>>> dimension'  is nonsense.
>>>
>>> Since 'everything' in this part of the paper is light along a line
>>> segment going out and back, everything there IS in just one dimension.
>>>
>>> See my other reply I just posted.
>>>>
>>>> Actually 'everything happens in three dimensions' (if you ignore time).
>>>>
>>>> A ray of light could be approximated by a single line, but simply is
>>>> not a one-dimensional line.
>>>
>>> It's not an approximation. It is a simplification.
>>
>> Sure, but the line is an approximate simplification of a ray, but not
>> a ray.
>
> So use a ray then.
> (actually for this part we use a line segment, one with endpoints A and B)
>>
>> This line belongs to a different realm than a ray, because nothing in
>> the universe is actually one-dimensional.
>
> A line and a ray are both 1 dimensional mathematical objects, as is a
> line segment. As a simplification (not an approximation) they are used
> for the mathematical analysis of the problem.

I mean 'ray in the real world' with 'ray', of course.

In geomoetry you have also a construct called 'ray', but that cannot be 
produced by a torch, for instance.

>>
>> Lines, circles, squares and so forth are simply non-existent in the
>> real world.
>
> Once again, they are simplifications.


Mathematical objects belong to mathematics and real world objects to the 
real world.

And you must not confuse one with the other.
...


TH

Back to sci.physics.relativity | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Re: Ehrenfest paradox Volney <volney@invalid.invalid> - 2024-01-19 11:37 -0500
  Re: Ehrenfest paradox Thomas Heger <ttt_heg@web.de> - 2024-01-21 08:02 +0100
    Re: Ehrenfest paradox Volney <volney@invalid.invalid> - 2024-01-21 13:51 -0500
      Re: Ehrenfest paradox Thomas Heger <ttt_heg@web.de> - 2024-01-22 07:34 +0100
        Re: Ehrenfest paradox Volney <volney@invalid.invalid> - 2024-01-22 12:40 -0500
          Re: Ehrenfest paradox Thomas Heger <ttt_heg@web.de> - 2024-01-23 09:53 +0100
            Re: Ehrenfest paradox Volney <volney@invalid.invalid> - 2024-01-23 11:51 -0500
              Re: Ehrenfest paradox Thomas Heger <ttt_heg@web.de> - 2024-01-24 08:15 +0100
                Re: Ehrenfest paradox Chung Espinoza Bolívar <soio@ncpzecsa.es> - 2024-01-24 12:55 +0000

csiph-web