Feather Under Laser (IMAGE) University of Kansas Caption This is a feather under reflected and matrix fluoresced illumination. (A) Reflected light microscopy, with only barbs visible. (B) Polarized light, some traces of barbules. (C) A laser-stimulated fluorescence of matrix behind carbon film backlights the feather and renders the barbules visible across the entire field of view. Credit KU News Service/University of Kansas Usage Restrictions None License Licensed content 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.