Bohr isn't wrong yet
http://www.energetic-medicine.net/bioenergetic-articles/articles/59/1/Bohr-isn039t-wrong-yet/Page1.html
David Dunstan
David Dunstan
MA(Cantab) PhD(Hull) FInstP FRSA
Head of Department
Professor of Experimental Physics
David Dunstan studies the high-pressure properties of matter and has developed diamond anvil cells for this purpose that are now manufactured commercially. He also works on coherency strain, to create new materials that have high strength over wider temperature ranges, and on the x-ray techniques needed to characterise these materials. His core experimental technique is optical spectroscopy. This requires the collection and control of light, and collaboration with commercial companies in this area has led to him designing the lighting of the Hope diamond in the Smithsonian Museum.
By David Dunstan
Published on 05/9/2008
Bohr isn't wrong yet
Bohr isn't wrong yet
Bohr isn't wrong yet
07 August 2004
From New Scientist Print Edition. Subscribe and get 4 free issues.
David Dunstan, London, UK
Shariar Afshar has certainly built an ingenious set-up (24 July, p 30). However, if his
double-slit experiment performed as claimed, it would refute classical optics rather
than standard quantum mechanics. His grid of fine wires constitutes a diffraction
grating, which splits an incident beam into multiple beams at angular separations
equal to the angular separation of his pinholes. The image formed of each pinhole is
not a single spot, but a row of spots. When both pinholes are open, so that the
interference pattern exists, the spots imaged from each pinhole are superposed. A
photon detected at one of these spots may therefore have come through either
pinhole or, as quantum mechanics demands, through both pinholes.
There is no "which-way" information, and Bohr's ideas do not need to be thrown on
the scrap-heap just yet. Afshar has not succeeded where Einstein failed.
Queen Mary, University of London
From issue 2459 of New Scientist magazine, 07 August 2004, page 24
Source:
http://www.newscientist.com/article/mg18324594.100-bohrisnt-
wrong-yet.html
07 August 2004
From New Scientist Print Edition. Subscribe and get 4 free issues.
David Dunstan, London, UK
Shariar Afshar has certainly built an ingenious set-up (24 July, p 30). However, if his
double-slit experiment performed as claimed, it would refute classical optics rather
than standard quantum mechanics. His grid of fine wires constitutes a diffraction
grating, which splits an incident beam into multiple beams at angular separations
equal to the angular separation of his pinholes. The image formed of each pinhole is
not a single spot, but a row of spots. When both pinholes are open, so that the
interference pattern exists, the spots imaged from each pinhole are superposed. A
photon detected at one of these spots may therefore have come through either
pinhole or, as quantum mechanics demands, through both pinholes.
There is no "which-way" information, and Bohr's ideas do not need to be thrown on
the scrap-heap just yet. Afshar has not succeeded where Einstein failed.
Queen Mary, University of London
From issue 2459 of New Scientist magazine, 07 August 2004, page 24
Source:
http://www.newscientist.com/article/mg18324594.100-bohrisnt-
wrong-yet.html