05_02_11 - 28 Wave properties of neutrons, atoms and ions...

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Unformatted text preview: 28 Wave properties of neutrons, atoms and ions Stern and Estermann (1930) Interference pattern for helium atoms. Similarly helium ions show interference. Interference after reflection on a surface, top view: 02/11/2005 Li F crystal He Detector D sin = n 10 Neutrons, discovered in 1932, also show interference patters and can be used for diffraction experiments, for example in the new SNS laboratory in Tennessee. Georg.Hoffstaetter@Cornell.edu 29 Spalation Neutrino Source SNS Oak Ridge Tennessee 02/11/2005 Georg.Hoffstaetter@Cornell.edu 30 Formation of optical images At low exposure, the few photons that lead to a reaction in a photographic plate are statistically distributed. Hits of individual photons can be observed. 02/11/2004 With increasing exposure, the interferences of electromagnetic waves that refract in the lens of the camera and form the image become apparent. The image formed by many photons forms corresponds to the image formed by interfering electromagnetic waves. Georg.Hoffstaetter@Cornell.edu ...
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05_02_11 - 28 Wave properties of neutrons, atoms and ions...

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