A practical comparison between the methods of determining the focal length of a convex lens. University of Thi-Qar Journal of Science, [S. l.], v. 6, n. 3, p. 68–74, 2019. Disponível em: https://jsci.utq.edu.iq/index.php/main/article/view/35.. Acesso em: 3 may. 2024.