No Hogwarts Invitation Required: Invisibility Cloaks Move into the Real-life Classroom (image) The Optical Society Share Print E-Mail Caption In a diffusive light-scattering medium, light moves on random paths. A normal object casts a shadow, an object with an invisibility cloak does not. Credit R. Schittny, KIT 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.