The spatially separated cavity modes (IMAGE) ETH Zurich Department of Physics Caption The spatially separated cavity modes, shown here being reflected from a mirror. Credit ETH Zurich/D-PHYS Benjamin Willenberg Usage Restrictions None License Original 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.