Microparticle held with optical tweezers (IMAGE) University of Münster Caption A microparticle held with optical tweezers in the microscope. Inset: Illustration of the held particle (magnified); shown in red is the light of the infrared laser used. Credit Pascal Runde Usage Restrictions The use of the photo is permitted exclusively in connection with this press release and with reference to the source. 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.