Tamang, SushmikaSuchai Nopparatjamjomrasสุชัย นพรัตน์แจ่มจำรัสRatchapak ChitareeThasaneeya R Nopparatjamjomrasทัศนียา รัตนฤาทัย นพรัตน์แจ่มจำรัสMahidol University. Institute for Innovative LearningMahidol University. Faculty of ScienceMotithang Higher Secondary School2015-08-032018-01-262015-08-032018-01-262015-01Physics Education, Vol.50, (2015), 28-31https://repository.li.mahidol.ac.th/handle/20.500.14594/3394A container was placed on top of a piece of white paper, and a pin positioned so that it vertically touched an outside wall of the container. Students were asked to predict the image of the pin when it was observed from the top of the container. Two scenarios of either an empty container or a container completely filled with water were considered in order to raise students’ thinking involving the concepts of refraction and total internal reflection.engMahidol UniversityArticleIOP Publishing Ltd10.1088/0031-9120/50/1/28