XPost: sci.electronics.design
From: PointedEars@web.de
Bill Sloman wrote:
> On 13/02/2026 6:04 am, john larkin wrote:
>> On Thu, 12 Feb 2026 19:39:50 +0100, nospam@de-ster.demon.nl (J. J.
>> Lodder) wrote:
>>> john larkin wrote:
>>>> Do photons have the same gravitational effects as their mass
>>>> equivalents?
Yes.
>>> Yes. (there is no such thing as 'mass-equivalence, there is only
>>> mass-energy)
Utter nonsense.
>> If e and m are the same thing, why do people use two symbols?
They simply are NOT the same thing. Also, one uses "E", not "e", for energy.
> They can behave in very different ways. Mass can stay put. Energy tends
> to travel at the speed of light.
Utter nonsense. Mass and energy are quantities, not physical objects.
>> Do photons attract one another? Do they bounce off one another?
>
> Crossed laser beams don't seem to interact.
They do if their energy is large enough. But the virtual leptons or quarks
that are temporarily produced cannot be observed directly.
>> If you apply Newton's law of gravitation to photons, the force will be
>> enormous when they get in a close intersection. Wouldn't that fuzz up
>> images at cosmological distances?
>
> It doesn't seem to. The mass of most photons is pretty small,
You could say that; it is *zero* :-D
> and when they are travelling at the speed of light they don't interact
> for very long.
Nonsense.
>> Just asking.
>
> But not thinking at all.
You, too, do not know what you are talking about.
F'up2 sci.physics.relativity
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PointedEars
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