Re: What is a photon

Am Montag000023, 23.06.2025 um 22:40 schrieb Paul.B.Andersen:

Den 23.06.2025 07:53, skrev bertietaylor:

On Wed, 11 Jun 2025 18:50:07 +0000, Paul.B.Andersen wrote:
>

>
If EM-radiation is a wave in an aether, it would be as easy
to measure the speed of Earth relative to the aether,
as it is to measure the speed of an aeroplane relative to the air.

 

>
No. it is impossible, for reasons explained many a time, and once again
below. For note,  aether is solid not gaseous like air. For another, the
speed of the aeroplane is based upon the rate of movement with respect
to the ground below it.

 The "Airspeed Indicator" found in all planes measures the speed
of the air relative to the plane.
 

>
So if I toss a ball in a plane any way, its speed is always the same. I
cannot find the speed of the ball one way with respect to the ground.

 This is obvious, and need no "explanation".

Actually the surface of planet Earth moves, too.
This movement is also quite fast, but usually ignored.
We could, however, use this as a principle and ignore the velocity of reference systems in all cases, where we cannot decide, whether something moves or not.
Therefore all inertial frames of reference do not move by definition, if they rest in respect to the observer, whether they actually move or not.
This makes everything 'relative' (to the observer), which includes actually matter, too.
This would include also 'the aether', too, hence aether would be something, which rests in respect to the observer in question, while not in respect to other observers.
Other observers therefore need their own 'aether' (and also their own matter!).
This is why it is impossible to measure the speed of the aether, because 'aether' is defined as being at rest in respect to the observer.
...
TH