Valgustiivikud esinevad mitmesugustes vormides ning neid kasutatakse teadusmuuseumides sageli „kiirgusrõhu“ illustreerimiseks; tegemist on teadusliku põhimõttega, mida need seadmed tegelikult ei demonstreeri.
A light mill come in various forms, such as the one pictured, and are often used in science museums to illustrate "radiation pressure" – a scientific principle that they do not in fact demonstrate.
