International Journal of Science and Applied Science: Conference Series P-ISSN: 2549-4635 Int. J. Sci. Appl. Sci.: Conf. Ser., Vol. 2 No. 1 (2017) E-ISSN: 2549-4627 International Conference on Science and Applied Science 2017 doi: 10.20961/ijsascs.v2i1.16750 381 Virtual Lab Experiment: Physics Educational Technology (PhET)Photo Electric Effect for Senior High School Supurwoko 1 , Cari 2 , Sarwanto 1 , Sukarmin 1 , Rini Budiharti 1 , Tiarasita Summa Dewi 1 1 Physics Education Department of Graduate Program UNS, 36A. Ir. Sutami street, Kentingan, Jebres, Surakarta 57126, INDONESIA 2 Physics Department of Graduate Program UNS, 36A. Ir. Sutami street, Kentingan, Jebres, Surakarta 57126, INDONESIA E-mail: supurwoko@staff.uns.ac.id Abstract. This paper introduced these Physics Educational Technology (PhET) Simulation and demonstrated their utility for Senior High School Students. The PhET simulations are very involved, interactive animated environments that create a unique opportunity for students. In each case, we demonstrate that discussion simulations are more productive, for developing student conceptual understanding for photo electric effect than traditional discussion without simulations. During the discussion with PhET simulation, students can construct their understanding about concepts photo electric effect within this framework. Students learn by building on their prior understanding through a series of constrained and supportives exploration. The simulations support an interactive approach and constrain students productively. 1. Introduction Physics is one of the most fundamental natural sciences which are a field that involves the study of universal law and the behaviors and relationship among a wide range of physical concept and phenomena. Understanding and mastery of the concept of physics is good and true in learners will be able to contribute appropriately to technological progress. The concept of physics are good and right can be realized through education that is implemented according to the appropriate approach, strategy, method, and media in the learning process. Through the learning of physics student acquires conceptual knowledge relevant to their daily life and develop scientific attitude and vision. This scientific attitude and vision can be developed by allowing young minds to perform experiments in the physics lab and observe and understand the scientific phenomena to happen in a natural world in which we live [10] . The process of reproducing phenomena in the laboratory enables scientists to study, in quantitative detail, aspects of specific phenomena, and to understand specific concepts [8] . One of the causes of low student achievement on the subject of physics is the learning media used by teachers less attract students [12] . In general, Physics learning media rely solely on whiteboards. Physics Learning using blackboards attracts students