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From: Jim Pennino <jimp@gonzo.specsol.net>
Newsgroups: sci.physics,sci.physics.relativity
Subject: Re: What is a photon
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Date: Tue, 10 Jun 2025 15:45:14 -0700
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In sci.physics Bertitaylor <bertietaylor@myyahoo.com> wrote:
> On Tue, 10 Jun 2025 18:59:05 +0000, Paul.B.Andersen wrote:
> 
>> Den 05.06.2025 13:51, skrev bertitaylor:
>>> On Wed, 4 Jun 2025 12:32:19 +0000, Paul.B.Andersen wrote:
>>>
>>>> Maybe you don't know what invariant means?
>>
>>>
>>> Invariant means that the speed does not depend upon the speed of the
>>> emitter, in this case.
>>
>> Invariant means that the speed of light in vacuum
>> is the same in all inertial frames of reference.
> 
> No, invariant means that the speed of light does not vary with the speed
> of the emitter.

Like most everything you are wrong about, this is a simple look up,
crackpot.

invariant meaning in physics:

In physics, "invariant" means a quantity that does not change under
a specific transformation, like a change in reference frame or a
rotation. Essentially, it's something that remains constant despite
how you describe it or how the system is viewed.

> 
> There is no such thing as the inertial reference frame in the entire
> universe.

inertial reference frame meaning in physics:

In physics, an inertial frame of reference (also called a Galilean
frame of reference) is a frame of reference where Newton's first law
of motion (inertia) holds true. This means that objects within that
frame will remain at rest or move at a constant velocity unless acted
upon by an external force.

<snip remaining crackpot drivel>

-- 
penninojim@yahoo.com