Experiments concerning electrodynamics nonlocality

[Khrapko]

Now it is not clear, how an angular momentum is distributed over a
circularly polarized light beam. According to the standard
electrodynamics, it is concentrated exclusively near to the surface of
the beam, where Poynting vector has transverse components. But,
according to Feynman�s reason and to the quantum theory, the angular
momentum fills all body of the beam because of photons with their
spins. Therefore it is not clear, where the torque acts on a screen
absorbing such a beam, or on a half-wave plate, which changes the
handedness of the circular polarization. However in any case there is
a problem. If the torque acts near the boundary of the alight zone in
accordance with Maxwell stress tensor, it means that, though energy of
photons is absorbed by all area of the screen, their spin is absorbed
in the other place, on periphery. If the torque is allocated on all
area of the screen, there, where photons are absorbed, it means that
Maxwell stress tensor gives a wrong local description of the
phenomenon.

We offer [1] to interfere two beams, which pass through two half-
wave plates, one of which is divided into two parts concentrically.
Each of the parts of the plate can be rotated manually independently.
Because of such a rotation, the torque works on the plate, and the
light frequency changes. It results in a movement of interference
fringes. Observing of this movement makes it possible to determine,
where the torque is applied.
[1] http://khrapkori.wmsite.ru/ftpgetfile.php?module=files&id=34

Radi Khrapko http://khrapkori.wmsite.ru/