Nurul Amalia Silviyanti Siswoyo, N.A.S.S. and Rinaldy Harjo Purnomo, R.H.P. 2025. Influence of Adding a Convex Lens as a Solar Concentrator on the Performance of Solar Cooker with an octagonal panel: Nurul Amalia Silviyanti Siswoyo and Rinaldy Harjo Purnomo. Jurnal Fisika dan Aplikasinya. 19, 3 (May 2025). DOI:https://doi.org/10.12962/j24604682.v19i3.3079.