Physics is crucial to understanding the world around us, the world inside us, and the world beyond us. It is the most basic and fundamental science, but it is also considered one of the most difficult subjects in school. For Physics instruction to be effective, it must encourage the kind of learning that leads to conceptual understanding. It was pointed out that improving students' understanding of fundamental Physics concepts can only be achieved by active involvement of students in learning activities. Physics Education Technology (PhET) Interactive Simulation-based activities could be a way to increase visualizations of students leading to a deeper understanding of Physics concepts. Visualization is especially useful for helping students to see structure and processes that are traditionally invisible to students