Setiaji, Ismi R., and Frida U. Ermawati. 2022. “Development of Five-Step Diagnostic Test on Light Wave Concepts to Analyze Students’ Understanding Map on The Concepts”. Radiasi : Jurnal Berkala Pendidikan Fisika 15 (1), 43-59. https://doi.org/10.37729/radiasi.v15i1.1754.