Design of an X-ray telescope. (IMAGE) Tokyo Metropolitan University Caption Concentric arrays of slits allow X-rays to enter and reflect off the inside walls, nudging them so that they are directed to a single point. Credit Tokyo Metropolitan University Usage Restrictions can be used with credit. 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.