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Newsgroups: sci.physics.relativity
Subject: Re: Time Dilation Can Only be Detected at Velocities Close to the Speed of Light
From: nospam@de-ster.demon.nl (J. J. Lodder)
Reply-To: jjlxa31@xs4all.nl (J. J. Lodder)
Date: Tue, 19 Nov 2024 09:41:03 +0100
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Mikko <mikko.levanto@iki.fi> wrote:

> On 2024-11-17 19:03:25 +0000, J. J. Lodder said:
> 
> > Mikko <mikko.levanto@iki.fi> wrote:
> > 
> >> On 2024-11-15 21:52:05 +0000, LaurenceClarkCrossen said:
> >> 
> >>> Time Dilation Can Only be Detected at Velocities Close to the Speed of
> >>> Light
> >> 
> >> Is one tenth of c close? At that speed time dilation is easy to observe.
> >> 
> >> Time dilation is observed at the speed of an aeroplane.
> >> 
> >> Oscillators currently studied in laboratories will in near future permit
> >> the detection of time dilation at walking speed.
> > 
> > Amost  there:
> > 0.3 meter of altitude is equivalent to about 9 km/h in speed.
> > More than walking, but already less than running,
> 
> Gravitational effect has already been demonstrated on smaller altitude
> difference:
> 
> https://www.snexplores.org/article/a-new-clock-shows-how-gravity-warps-time-ev
en-over-tiny-distances 

Yes, that has been mentioned here several times already.
But that is inside one, not for an entire clock.

> However, Experiments with moving things are harder. All moving parts
> tend to generate noise. Clocks are easiest to compare when stationary
> side by side but then at least one of them must be accerated between
> the comparisons and one must ensure that the acceleration does not
> affect the clocks rhythm.

Has also been done already, with a van-mounted strontium clock.
<https://phys.org/news/2018-02-optical-clock-gravitation.html>

They don't talk about the Lorentz factors involved in driving the car,
but they must have compensated for them to get the gravity measurements
right.

One of the things the nutters here tend to forget
is that physicsts are not working all the time
to 'prove relativity right'.
Relativity is standard 'unproblematic background knowledge'.
It will be demonstated explicitly only when some parameter
can be pushed back by another decade.

They are out to do more interesting things.
Standard relativistic corrections are applied as a matter of course,
when and where needed,

Jan