Blog Ekkehard Friebe

By Carlos E. Navia et al.

Beitrag aus dem GOM-Projekt: 2394 weitere kritische Veröffentlichungen
zur Ergänzung der Dokumentation Textversion 1.2 – 2004, Kapitel 4.  

Search for anisotropic light propagation as a function of laser beam alignment relative to the earth’s velocity vector / C. E. Navia, C. R. A. Augusto, D. F. Franceschini, M. B. Robba and K. H. Tsui. In: Progress in physics. Vol. 1. 2007, January, S. 53-60. – arXiv:astro-ph/0608223v1 10 Aug 2006.
Auch unter URL: http://arxiv.org/PS_cache/astro-ph/pdf/0608/0608223v1.pdf

A laser diffraction experiment was conducted to study light propagation in air. The experiment is easy to reproduce and it is based on simple optical principles. Two optical sensors (segmented photo-diodes) are used for measuring the position of diffracted light spots with a precision better than 0.1 ?m. The goal is to look for signals of anisotropic light propagation as function of the laser beam alignment to the Earth’s motion (solar barycenter motion) obtained by COBE. Two raster search techniques have been used. First, a fixed laser beam in the laboratory frame that scans due to Earth’s rotation. Second, an active rotation of the laser beam on a turntable system. The results obtained with both methods show that the course of the light rays are affected by the motion of the Earth, and a predominant quantity of first order describes well the experimental results. This result differs in a amount of 18% from the Special Relativity Theory prediction.

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