Factors Causing Learning Difficulties in Elementary School Students’ Understanding of Optical Concepts. BIOCHEPHY: Journal of Science Education, [S. l.], v. 6, n. 1, p. 83–94, 2026. DOI: 10.52562/biochephy.v6i1.1967. Disponível em: https://journal.moripublishing.com/index.php/biochephy/article/view/1967. Acesso em: 2 sep. 2026.