This study investigated the view of physics teachers and students in difficult topics and concepts in waves theme in the curriculum of Physics in secondary schools in Ife North Local Government Area of Osun State, Nigeria. Specifically, it sought to determine difficult topics and abstract concept in wave theme from students' perception and to examine the likely reasons for difficulty in wave’s concept from students and teachers perception. Descriptive survey research design was considered appropriate for the study. The study population comprised 310 physics students and 15 physics. The sample consists of 180 Physics students selected though simple random technique and 6 Physics teachers selected purposively. Two instruments were used for this study, the first instrument was meant for students to address three research questions while the second instrument meant for the teachers addressed one research question The instruments were validated by two experts to ascertain face and content validity. The data was analyzed using Relative Strength Index (RSI). The results of the findings study showed that mathematical complexity, excessive formulas, and limited practical demonstrations are the main reasons for experiencing difficulty in wave’s motion. It was recommended among others that the outcome of research like this should be made available to stakeholders.