Massive Photons 2 (IMAGE) University of Warsaw, Faculty of Physics Caption Tomography of circularly polarized light reflected from an optical cavity filled with liquid crystal. (Source: M. Krol, UW Physics) Credit Source: M. Krol, UW Physics Usage Restrictions The image may only be used with the following caption: Tomography of circularly polarized light reflected from an optical cavity filled with liquid crystal. (Source: M. Krol, UW Physics) License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.