JPFA, E. 2020. Introduction, Author Guidlines, and Table of Contents JPFA Vol 10 No 2 December 2020. Jurnal Penelitian Fisika dan Aplikasinya (JPFA). 10, 2 (Dec. 2020), ii-vi. DOI:https://doi.org/10.26740/jpfa.v10n2.pii-vi.