Fluid-Switchable Smart Window (video) The Optical Society Share Print E-Mail Loading video... Caption A new type of smart window uses liquid to switch from reflective to clear. The new technology is inexpensive to make and could help make buildings and homes more energy efficient. Credit Keith Goossen, University of Delaware 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.