In dense urban centers, many people live and work in dim and narrow streets surrounded by tall buildings that block sunlight. To alleviate the problem, Egyptian researchers have developed a corrugated, translucent panel that is mounted on rooftops and hung over the edge at an angle, where it spreads sunlight onto street below. Researchers describe their design in a paper published in Energy Express, a supplement of The Optical Society’s open-access journal Optics Express.
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