Atom laser caustic (IMAGE) Washington State University Caption An atom laser flowing from top to bottom makes a “caustic”, a refracted pattern like that often made by light, as it encounters an obstacle. Credit Washington State University Usage Restrictions For use only with stories associated with this press release 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.