VITHARANA, P.R.K.A. Students’ Understanding of Liıght Concepts ın the Secondary School. International Journal for Innovation Education and Research, Dhaka, Bangladesh, v. 3, n. 6, p. 36–49, 2015. DOI: 10.31686/ijier.vol3.iss6.377. Disponível em: https://scholarsjournal.net/index.php/ijier/article/view/377. Acesso em: 23 jun. 2025.