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July 25th, 2003
Measuring invisible reflections
Beams with a wavelength of around 13 nanometers, like their close relatives, x-rays, can neither be reflected nor focused with conventional optical systems. One solution is to use curved mirrors that - unlike those in your bathroom - are coated with hundreds of alternating layers of different materials. Each layer reflects a small part of the radiation. Researchers at the Fraunhofer Institute for Material and Beam Technology IWS rejoiced last year when they broke the 70-percent reflectivity barrier.
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