Science Advance. open online journal

© Illustration Alexander Krebs

The Photon Spin - A Natural Constant?

Alexander Krebs, Christoph Krebs

University of Munich, München 80539, Germany 
Published: 2023-03-14
Eprint: arXiv:2205.48714v3 

According to the particle conception, visible light consists of photons with spin h/2π. In fact, the spin of visible light can not only be verified by spectroscopic means but also directly by macroscopic measurement of angular momentum. However, an experimental verification of the photon spin of electromagnetic radiation of very large wave lengths has not yet been accomplished. Nevertheless, today the quantity of the photon spin is considered constant throughout all wave lengths. The question is if the photon spin with growing wave lengths and with a photon mass approaching zero can retain the constant value h/2π. For this reason, we set ourselves the goal to measure the spin of radio wave photons. Therefore, we also had to use a macroscopic measurement method of the angular momentum (scattering of circular polarized radio waves by a thin aluminum disc), since methods of measurement using atomic physics are not possible at very large wave lengths. Finally, we further refer to the experiments of the past decades with satellites: Presupposed a frequency-independent photon spin there should be observable corresponding angular momentum effects on circular polarized transmitting satellites. 

Cite this article

Krebs A., Krebs C. The photon spin - a natural constant? Science Advance (2023).

Science Advance.

Wir benötigen Ihre Zustimmung zum Laden der Übersetzungen

Wir nutzen einen Drittanbieter-Service, um den Inhalt der Website zu übersetzen, der möglicherweise Daten über Ihre Aktivitäten sammelt. Bitte überprüfen Sie die Details in der Datenschutzerklärung und akzeptieren Sie den Dienst, um die Übersetzungen zu sehen.