Microspheres Changing Color (video) University of California - Riverside Share Print E-Mail Loading video... Caption Rotation of microspheres in a vertically changing external magnetic field. The color is switched between on (blue) and off states. Credit Yin lab, UC Riverside Usage Restrictions None Share Print E-Mail 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.