New retroreflective material could be used in nighttime color-changing road signs - Phys.org

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New retroreflective material could be used in nighttime color-changing road signs (https://phys.org/news/2019-08-retroreflective-material-nighttime-color-changing-road.html) Phys.orgA thin film that reflects light in intriguing ways could be used to make road signs that shine brightly and change color at night, according to a study that will be ...


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