Department of Physics Education;
FKIP;
Palangkaraya University;
Central Kalimantan 73111;
Indonesia;
Department of Physics;
Faculty of Sciences and Technology;
Airlangga University;
Surabaya 60115;
Indonesia;
Department of Physics;
Faculty of Mathematics and Natural Sciences;
Gadjah Mada University;
Yogyakarta 55281;
Indonesia;
Department of Electrical Engineering;
National Technology High School;
Yogyakarta 55281;
Indonesia;