Fitrah Ayu Students of physics education post graduate program, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang.
Prof. Dr. Hamka Street, Air Tawar Padang, Sumatera Barat. Indonesia Indonesia
Ahmad Fauzi 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. Indonesia