setup (IMAGE) Vienna University of Technology Caption Sketch of the concept: a disordered medium (a) is made perfectly transmitting by placing a custom-made anti-reflection coating in front of it (b). Credit TU Wien 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.