english: So we built a rough prototype of a spectrometer, and you can shine light through different substances that produce different spectrums, so that can help you identify what's in the water.
non_english: Pa smo napravili grubi prototip spektometra, možete da obasjavate različite supstance i tako proizvodite različite spektre, i to vam može pomoći da otkrijete šta je u vodi.