UV photons (IMAGE) Johannes Gutenberg Universitaet Mainz Caption Conversion of readily available blue light into high-energy UV photons that cannot be provided by sunlight Credit ill./©: Christoph Kerzig, JGU Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.