Article <v785n5$1poqk$1@dont-email.me>

Warning: mysqli::__construct(): (HY000/1203): User howardkn already has more than 'max_user_connections' active connections in D:\Inetpub\vhosts\howardknight.net\al.howardknight.net\includes\artfuncs.php on line 21
Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connections
Warning: mysqli::query(): Couldn't fetch mysqli in D:\Inetpub\vhosts\howardknight.net\al.howardknight.net\index.php on line 66
Article <v785n5$1poqk$1@dont-email.me>

Deutsch English Français Italiano

<v785n5$1poqk$1@dont-email.me>

View for Bookmarking (what is this?)
Look up another Usenet article

Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Mikko <mikko.levanto@iki.fi>
Newsgroups: sci.physics.relativity
Subject: Re: Approximately 300,000 km/s With Respect To What?
Date: Wed, 17 Jul 2024 13:17:09 +0300
Organization: -
Lines: 42
Message-ID: <v785n5$1poqk$1@dont-email.me>
References: <v6pdg9$2k01g$1@dont-email.me> <v6qssk$2vb8b$1@dont-email.me> <6690fd8f$0$8002$426a34cc@news.free.fr> <v708ia$3lom$1@dont-email.me> <66965257$3$8002$426a74cc@news.free.fr>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit
Injection-Date: Wed, 17 Jul 2024 12:17:09 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="d92d20f87707bf0424e9a8a28e9f3d9b";
	logging-data="1893204"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX18rCuP8aRZGUlVhK2s++AwT"
User-Agent: Unison/2.2
Cancel-Lock: sha1:bz7SuDAakdJxm0P2N5eGISsNaAE=
Bytes: 2516

On 2024-07-16 10:58:32 +0000, J. J. Lodder said:

> Mikko <mikko.levanto@iki.fi> wrote:
> 
>> On 2024-07-12 09:55:27 +0000, J. J. Lodder said:
>> 
>>> Mikko <mikko.levanto@iki.fi> wrote:
>>> 
>>>> On 2024-07-11 19:58:02 +0000, amirjf nin said:
>>>> 
>>>>> Approximately 300,000 km/s with respect to what?
>>>> 
>>>> Whenever the speec of something is measured it is measured with respect
>>>> to someting else. The report should make clear what is the reference that
>>>> is considered stationary. Usually it is the instruments used in the
>>>> measurement, and usually but not always they are at rest with restpect to
>>>> Earth surface at the place of the measurement.
>>> 
>>> You really need to have a look at what and how is actually measured,
>>> instead of elaborating your own ideas of measurement.
>> 
>> Yes, that is a correct interpretation of my words. Of course, what and
>> how is not alwasys the same so you need to look at thar separately for
>> each measurement.
> 
> The first electromagnetic measurement of the 'speed of light',
> by Weber and Kohlrausch, didn't involve any velocity at all.
> They pointed the way for Maxwell.
> 
> Maxwell's equations [1] likewise have a   c  in them
> but no velocity,
> 
> Jan
> 
> [1] In Heaviside-Lorentz units for example.

One may even regard c as the conversion factor between meters and seoonds
just like 25,4 is the conversion factor between metric inches and meters.

-- 
Mikko