180 Degree Bend (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Field distribution after the transformation of a dielectric material shows the nearly perfect transmission of a light beam around a 180 degree bend. Credit (Image courtesy of Zhang group Usage Restrictions None 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.