Rahimatul Utia Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang, Jl. Prof Hamka, Padang 25131, Indonesia Indonesia
Ahmad Fauzi Physics Teacher, SMAN 1 Sawahlunto (Senior High School Number 1 at Sawahlunto City), Jl. Jend. Sudirman No. 7, Kubang Sirakuk Selatan, Sawahlunto 27411, Indonesia