This study aims to develop physics learning media in the form of e-modules assisted by WhatsApp as an alternative to learning during the Covid 19 pandemic that meets valid, practical, and effective indicators. This type of research is R&D, with a four D approach. The stages of development consist of defining, designing, developing, and limited dissemination. The subjects of this study consisted of 3 validators and 23 students of the Physics Education Study Program of the IKIP PGRI Pontianak who took Core Physics courses for the 2019/2020 school year. The determination of the validity criteria used the Aiken V index test. The results of this study indicate that the criteria for the validity of the e-module presentation components, the feasibility of the content and language of the module have met the high validity criteria with an average index of V = 0.9, so that overall it is concluded that the learning media Physics in the form of e-module assisted by WhatsApp as an alternative to learning during the Covid 19 epidemic that meets valid indicators has met valid criteria with high validity categories. The practicality level of the e-module shows that 56.52% of the total number of students give a very positive response to the module and 65.22% of students are very active when using e-modules, so that the e-modules developed are declared practical. The level of effectiveness of the module shows that 100% of students have a learning result score higher than the passing score (60) after using e-module, so it can be concluded that the e-module has met the criteria for being effective.