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Date: Tue, 7 May 2024 18:53:49 +0200
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Subject: Re: Scalar waves
Newsgroups: sci.physics.relativity
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W dniu 07.05.2024 o 18:42, J. J. Lodder pisze:
> Thomas Heger <ttt_heg@web.de> wrote:
> 
>> Am Montag000006, 06.05.2024 um 13:52 schrieb J. J. Lodder:
>>> Mikko <mikko.levanto@iki.fi> wrote:
>>>
>>>> On 2024-05-06 09:36:27 +0000, J. J. Lodder said:
>>>>
>>>>> A measurement is not a measurement unless it can be traced
>>>>> to a primary standard.
>>>>> So your multimeter measures 204.5 mA when it says so
>>>>> because the manufacturer of it says so.
>>>>> Your manufacturer can guarantee that,
>>>>> because he has calibrated the thing
>>>>> against his standard ampere meter.
>>>>> He knows that his standard meter measures amps
>>>>> because he takes it to his national standards lab,
>>>>> where they calibrate it for him.
>>>>> And ultimately (if you live in a small country)
>>>>> your national lab takes their standards to NIST, or BIPM,
>>>>> where they do have a primary standard.
>>>>
>>>> Possibly. Or the manufacturer or certifier or the national
>>>> laboratory may have a reference that they compare directly
>>>> to the definition.
>>>
>>> Certainly. Whatever,
>>> the point is and remains that a measurement isn't a measurement
>>> unless it can be traced to an SI standard.
>>> In many cases this is even required by law.
>>> Whatever is doing the calibrating must be a state-approved agency.
>>
>> Well, no!
>>
>> You can use any other consistent system of units, if you don't like
>> SI-units.
> 
> Certainly, and you can use any other system of dimensions
> than the one that is conventionally associated with the SI.
> 
>> But actually I was talking about dimensions and how those are defined.
>>
>> That term refers to WHAT is measured, while units define the quantities
>> of the measurement results.
> 
> Sure, you can invent your own definitions,
> but that is not how the term 'dimension' is used in physics.
> 
>> Simple example:
>>
>> you have a distance of roughly 1 meter and want to measure that.
>>
>> you could use inch, yards, forlongs, lightseconds, Angstroem, mm and the
>> size of the emperors feet.
>>
>> The choice of a unit would only influence the numerical value, but not
>> the measured distance.
> 
> You forget the only length unit that is still in everyday use,
> the second, up to an unconvenient conversion factor.
> Do I really need to remind you again that the meter has been abolished
> as a primary standard, and that all length measurements
> must (by the definition of the meter) be calibrated in seconds?

Only such an idiot can believe such impudent lies, Lod.