Hidden Images (image) The Optical Society Share Print E-Mail Caption A new technique can be used to hide multiple images in a printed array of rods with varying conductivities. Depending on the polarization of the terahertz radiation, different concealed images appear, such as the H and V illustrated here. Credit Ajay Nahata, University of Utah 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.