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Circularly polarized beam in a dielectric, etc.
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Josef Matz
science forum Guru Wannabe


Joined: 08 May 2005
Posts: 255

PostPosted: Thu Jun 29, 2006 9:30 am    Post subject: Re: Circularly polarized beam in a dielectric, etc. Reply with quote

<khrapko_ri@hotmail.com> schrieb im Newsbeitrag
news:1151364710.259696.187920@b68g2000cwa.googlegroups.com...
Quote:

Please, forward this publication to me. I am sure this formula is \int
rx(ExH), and so this quantity is an orbital AM, not spin in the sense
of the word as used in the field theory.
Josef Matz wrote:


No this formula is a E x E* but expressed in (x,y,z) coordinate system.
Dear Josef, I taught you many times that they used a wrong formula
spin=ExA.
If E=exp[i(z-t)], A=-iE, and spin=Re(ExA*)/2 =Re(iExE*)/2 =-Im(ExE*)/2.
This formula is presented by Timo et al. in Nature 394, 348 (1998), and
physics/0408080 with small mistakes.
This formula is wrong because ExA is a component of the wrong canonical
spin tensor. Physicists eliminate this tensor by the use of the wrong
Belinfante-Rosenfeld procedure. I wrote about this many times, see
Measurement Techniques, 46, No. 4, 317 (2003), or www.sciprint.org.
Radi Khrapko


Yes and E x A is zero in the time average isnt it ? But the formula of timo
i speak of
is a E x E* and a purely imaginary number. Thats Timo also.

And i remember a discussion with you short time ago that you - and not
Timo -
said that E x A is the right spin tensor, isnt it ?

E x A obviously is wrong !
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Josef Matz
science forum Guru Wannabe


Joined: 08 May 2005
Posts: 255

PostPosted: Thu Jun 29, 2006 9:37 am    Post subject: Re: Circularly polarized beam in a dielectric, etc. Reply with quote

<khrapko_ri@hotmail.com> schrieb im Newsbeitrag
news:1150783376.143795.311010@i40g2000cwc.googlegroups.com...
Quote:

Josef Matz wrote:
khrapko_ri@hotmail.com> schrieb im Newsbeitrag
news:1150393958.691618.235710@y41g2000cwy.googlegroups.com...
We calculate absorption of a circularly polarized light beam in a
dielectric in the frame of the standard electrodynamics. A transfer of
energy, momentum, and angular momentum from the beam to the dielectric
is calculated. The calculation shows that the angular momentum flux in
the beam equals to two power of the beam divided by frequency. This

No its just P/w for circular polarised light. Not 2P/w !
Analogon: Energy of photon hbar w, Spin = Energy / w for circular
polarized
photons.
P/w is for a plane wave, but 2P/w is for a beam

2 P/w how that ?

Quote:

And also note: Natural light has spin zero !
That's not the point


result contradicts another part of the electrodynamics, which predicts
the flux equals to power of the beam divided by frequency. In addition

for circular polarized light only or ?

Quote:

therefore your theory seems to be wrong.

Ok we will see.

Quote:
Therefore my theory is worthy of the Nobel Prize


All right. You have a fine goal !

Quote:
we show that this part of the electrodynamics contradicts the
classical
Beth's experiment. Our inference is: the electrodynamics is
incomplete.

That is true


To correct the electrodynamics, we introduce a spin tensor

Spin tensor concept is nonsense ! As long as your dielectrics do not
move
with velocities of at least
1% of c, which is the case because your dielectrics are at rest, for
what do
you need a spin tensor ?
Dielectric is not the point. Electromagnetic waves carry spin, and this
spin is described by the tensor.

into the electrodynamics. The corrected electrodynamics is in
accordance with our calculation and with the Beth's experiment.

This i doubt.
All doubt!

Radi Khrapko
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Radi Khrapko
science forum Guru Wannabe


Joined: 04 May 2005
Posts: 142

PostPosted: Sat Jul 01, 2006 5:32 pm    Post subject: Re: Circularly polarized beam in a dielectric, etc. Reply with quote

Josef Matz wrote:
Quote:
Experimental-Check-of-Electrodynamics,
www.sciprint.org


Could you tell me how i get your article on this web page ?
It's very simple
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Radi Khrapko
science forum Guru Wannabe


Joined: 04 May 2005
Posts: 142

PostPosted: Fri Jul 07, 2006 8:46 pm    Post subject: Re: Circularly polarized beam in a dielectric, etc. Reply with quote

The Beth experiment was intensively discussed at this page. So, I
inform you that I have posted a new paper "Paradox of the classical
Beth optics experiment" at www.sciprint.
I show that the celebrated Beth's experiment contradicts the angular
momentum conservation law in the frame of Maxwell electrodynamics
because Beth's birefringent plate experienced a torque without an
angular momentum flux in the surrounding space. However, this paradox
can be removed by introducing a classical spin tensor.
At the same time I submitted this paper to Journal of Optics A: Pure
and Applied Optics through IOP.
Radi Khrapko
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