🚀 go-pugleaf

"Y.Porat" <y.y.porat@gmail.com> wrote in message
news:1184675328.328746.275310@i13g2000prf.googlegroups.com...
> On Jul 17, 9:59 am, Pentcho Valev <pva...@yahoo.com> wrote:
>> Tom Roberts wrote in sci.physics.relativity:
>>
>> > martin wrote:
>> > > There is a question I have about the concept of wavelength of a
>> > > photon.
>>
>> > A photon has no intrinsic wavelength; indeed it's not clear whether the
>> > concept "wavelength" even applies to a photon. And there's also the
>> > difficulty of attempting to discuss "a" photon....
>>
>> Then, Roberts Roberts, discuss the textbook formula
>>
>> frequency = (speed of light)/(wavelength)
>>
>> In a gravitational field, the frequency varies with the gravitational
>> potential V in accordance with the equation
>>
>> f' = f(1+V/c^2)
>>
>> which is confirmed experimentally. The speed of light also varies with
>> the gravitational potential in accordance with Einstein's 1911
>> equation
>>
>> c' = c(1+V/c^2)
>>
>> As you can see Roberts Roberts, f'=f(1+V/c^2) and c'=c(1+V/c^2) are
>> consistent. However you say Einstein's 1911 equation c'=c(1+V/c^2) is
>> wrong but never give the correct equation. Why Roberts Roberts? Is
>> this some grand secret between hypnotists in Einstein criminal cult?
>>
>> Pentcho Valev
>
> -----------
> and i n addition
> photon ave loength

A photon as a particle doesn't have a well-defined length as such .. but due
to wave/particle duality, its wave does have a wavelength and frequency.

> is th emsot simply todetect ecperimentally
> and th most simple*and acurate * indentity to
> measuere
> waht else can you demand from a physical entity
> is there another propertyof the photon
> that is more acurately defined and tested ??

When it is a wave, it has wavelength and frequency .. as a particle it
doesn't.  Sorta.  But that's all in the fuzzy land of quantum physics.  We
do know that:
a photon has energy E = hf
a photon has momentum p = hf/c
a photon has spin = 1
a photon has charge = 0
a photon has mass = 0