Light rays in an optical fibre (IMAGE) Universiteit van Amsterdam Caption Light can travel through an optical fibre via different paths. The impossibility of knowing the exact path a light ray has taken leads to an effective dephasing noise. Credit L. Lami Usage Restrictions Free to use in the context of this study License Original 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.