Reverse sprinkler experiment/dye (IMAGE) New York University Caption This photograph shows fluorescein dye being ejected from the sprinkler as it spins in forward mode. Credit NYU's Applied Mathematics Laboratory. Usage Restrictions Use with this study only 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.