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Re: New version of my annotations to SRT

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On 2024-02-16 06:20:15 +0000, Thomas Heger said:

>> 
>> [ … ]

>> 
>> Can you quote the sentence in question?
> 
> sure:
> page 22, roughly in the middle
> 
> "We will now determine the kinetic energy of the electron. If an 
> electron moves from rest at the origin of co-ordinates of the system K 
> along the axis of X under the action of an electrostatic force X, ..."

Is this your translation? Is "the axis of X" what is normally called 
the x-axis in English? Maybe you could quote it in German so that 
someone who knows more German than I do can comment. Anyway, I agree 
that calling the abscissa axis the x-axis is not ideal, but it's very 
commonly done. In that case X is not a variable.
> 
> I disliked already the used of 'force' for electrical field strength.
> 
> But anyhow...
> 
> 'X' is here the x-component of the electric field-strength vector and 
> called 'X'
> 
> 'X' is also the name of the x-axis of system K.
> 
> Therefore we have twice the symbol 'X' in the same sentence (actually 
> also in the same line), but with two different meanings.
> 
> It is not really wrong, but VERY bad writing style.
> 
> At least Einstein could have made different types of symbols 
> distinguishable by attributes like italic or bold fonts.
> 
> 
> TH


-- 
athel -- biochemist, not a physicist, but detector of crackpots

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Re: New version of my annotations to SRT Thomas Heger <ttt_heg@web.de> - 2024-02-16 07:20 +0100
  Re: New version of my annotations to SRT "Paul B. Andersen" <relativity@paulba.no> - 2024-02-16 09:43 +0100
  Re: New version of my annotations to SRT Athel Cornish-Bowden <me@yahoo.com> - 2024-02-16 09:46 +0100
  Re: New version of my annotations to SRT Mikko <mikko.levanto@iki.fi> - 2024-02-16 11:53 +0200
  Re: New version of my annotations to SRT "Paul B. Andersen" <relativity@paulba.no> - 2024-02-16 13:59 +0100

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