3M（スリーエム）さんのインスタグラム動画 - (3M（スリーエム）Instagram)「Reflecting on the science of retroreflectivity? Did you know that retroreflective materials bounce light back to its source, making them ideal for safety applications? This is in contrast to “regular” reflective materials, that scatter the light with less directionality, so you don’t see as much of it coming back towards you. Whether you’re out for a nighttime run or driving in low-light conditions, retroreflective materials like those designed by @3M help keep us safe, whether behind the wheel or on the side of the road. Video partnership with #3M #sponsored #science #retroreflectivity #safetyfirst #sciencerules #todayilearned #TIL #physics #light」5月4日 20時40分