Analysis Of the Effectiveness of Project-Based Learning in the Optics and Electronics 1 Laboratory on Conceptual Understanding and Problem-Solving Skills Among Physics Education Students at UNTL. MAGNETON [Internet]. 2026 Jul. 31 [cited 2026 Aug. 14];4(2):115-20. Available from: https://journal.unwira.ac.id/index.php/MAGNETON/article/view/5452