Bohr is Still Wrong
http://www.energetic-medicine.net/bioenergetic-articles/articles/56/1/Bohr-is-Still-Wrong/Page1.html
The Administrator
EMR AdministratorBy The Administrator
Published on 05/9/2008
Bohr is Still Wrong
Bohr is Still Wrong
Bohr is Still Wrong
21 August 2004
From New Scientist Print Edition. Subscribe and get 4 free issues.
John G. Cramer, Seattle, Washington, US
A number of your readers have pointed out that Shahriar Afshar's grid wires are
placed in just the positions that would form a diffraction grating creating an image of
pinhole one at the position of the pinhole-two image. Does this destroy the purity of
Afshar's "which-way" measurement?
I raised the same question with Afshar earlier this year, and the answer is no. The
reason is that the wires intercept no light and so cannot diffract. He has done a
variation of his experiment using only a single wire and recorded all the light in the
focal plane of the pinholes under three conditions: wire in, one pinhole; wire in, two
pinholes; and wire out, two pinholes.
The first shows lots of scattering from the wire away from the image points,
indicating that with only one pinhole open the wire is intercepting and scattering light.
The second and third set-ups show clear images of the pinholes with nothing in
between and are indistinguishable.
The conclusion is that no light is scattered or intercepted by the wire in the second
case, because the interference pattern is present and the wire is at a zero intensity
position in the pattern. A single wire cannot function as a diffraction grating. Bohr is
still wrong.
Department of Physics, University of Washington
From issue 2461 of New Scientist magazine, 21 August 2004, page 26
Source
http://www.newscientist.com/article/mg18324614.100-bohr-is-still-wrong.html
21 August 2004
From New Scientist Print Edition. Subscribe and get 4 free issues.
John G. Cramer, Seattle, Washington, US
A number of your readers have pointed out that Shahriar Afshar's grid wires are
placed in just the positions that would form a diffraction grating creating an image of
pinhole one at the position of the pinhole-two image. Does this destroy the purity of
Afshar's "which-way" measurement?
I raised the same question with Afshar earlier this year, and the answer is no. The
reason is that the wires intercept no light and so cannot diffract. He has done a
variation of his experiment using only a single wire and recorded all the light in the
focal plane of the pinholes under three conditions: wire in, one pinhole; wire in, two
pinholes; and wire out, two pinholes.
The first shows lots of scattering from the wire away from the image points,
indicating that with only one pinhole open the wire is intercepting and scattering light.
The second and third set-ups show clear images of the pinholes with nothing in
between and are indistinguishable.
The conclusion is that no light is scattered or intercepted by the wire in the second
case, because the interference pattern is present and the wire is at a zero intensity
position in the pattern. A single wire cannot function as a diffraction grating. Bohr is
still wrong.
Department of Physics, University of Washington
From issue 2461 of New Scientist magazine, 21 August 2004, page 26
Source
http://www.newscientist.com/article/mg18324614.100-bohr-is-still-wrong.html