LED in a Vacuum Chamber (image) University of California - Santa Barbara Share Print E-Mail Caption This LED emits light under forward bias in an ultra high vacuum chamber allowing simultaneous electron emission energy. Credit Credit: Ecole Polytechnique, Ph. Lavialle 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.