Optical Setup (IMAGE) Optica Caption Researchers developed an analytical instrument that uses an ultrafast laser for precise temperature and concentration measurements of hydrogen. They used it to study the hydrogen flame shown here. Credit Alexis Bohlin, Luleå University of Technology 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.