Esti Aprilia Usman Student of physics education post graduate program, Faculty of Mathematics and Natural Science,
Universitas Negeri Padang. Indonesia
Asrizal Asrizal Lecturer of physics education post graduate program, Faculty of Mathematics and Natural Science,
Universitas Negeri Padang
Prof. Dr. Hamka Street, Air Tawar Padang, Sumatera Barat, Indondesia