Experiments, which are carried out by the students themselves, play a crucial role in the process of teaching physics. It is an empirical fact, what the students see with their own eyes is likely to be better retained in mind and thus they could be more easily recalled later and associated with other phenomena. The independent student experimentation ensures that students are active, therefore they are not only observing the experimentation process but they are also participating in it making it possible for the students to follow the path of researchers. This project illustrates the most important features of project-based learning inasmuch as the students were expected to organize the process on their own, meanwhile the teacher acted as a „coach”, merely supervising the students’ work.