Pliis, voisiko joku ammattifyysikko tai sellaiseksi aikova selittää hieman enemmän. Huolimatta siitä, että besserwisserit kirjoittavat 10 viestiä jokaista yhtä kunnon viestiä kohden, asia on niin kiintoisa että selaan viestit läpi ja etsin helmet. Kiitos etukäteen.
Physicists Modify Double-Slit Experiment to Confirm Einstein's Belief Discussion at PhysOrgForum
Work completed by physics professors at Rowan University shows that light is made of particles and waves, a finding that refutes a common belief held for about 80 years.
In this modified double-slit experiment, a laser beam hits a screen with two small pinholes. As a particle, light goes through one of the pinholes. Through a lens system, the light is then imaged onto two detectors, where a certain detector measures only the photons, which went through a particular pinhole. In this way, Afshar verified the particle nature of light. As a wave, light goes through both pinholes and forms a so-called interference pattern of bright and dark fringes.
“Afshar’s experiment consists of the clever idea of putting small absorbing wires at the exact position of the dark interference fringes, where you expect no light,” Knoesel said. “He then observed that the wires do not change the total light intensity, so there are really dark fringes at the position of the wires. That proves that light also behaves as a wave in the same experiment in which it behaves as a particle.”
The findings of the Afshar experiment were published online on January 23 in the Foundations of Physics, an international journal devoted to the conceptual bases and fundamental theories of modern physics, biophysics and cosmology, with several distinguished Nobel laureates on its editorial board. The print version was published in the February 2007 edition and is now available in libraries throughout the world.
“The important new contribution is that light carries both wave and particle aspects at all times, and future experiments will further clarify the nature of each component.” Afshar said.
Flores continued, “It is interesting to note that even after 80 years we can still gain a better understanding about the nature of light using refined measurement techniques and creative ideas and therefore are able add to the vast insights of former scientists.”
Citation: Paradox in Wave-Particle Duality, Shahriar S. Afshar, Eduardo Flores, Keith F. McDonald and Ernst Knoesel, Foundations of Physics, 23 January 2007, DOI 10.1007/s10701-006-9102-8