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Josef Matz
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Joined: 08 May 2005
Posts: 255

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

<khrapko_ri@hotmail.com> schrieb im Newsbeitrag
 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 !
Josef Matz
science forum Guru Wannabe

Joined: 08 May 2005
Posts: 255

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

<khrapko_ri@hotmail.com> schrieb im Newsbeitrag
 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
science forum Guru Wannabe

Joined: 04 May 2005
Posts: 142

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

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
science forum Guru Wannabe

Joined: 04 May 2005
Posts: 142

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