ساينس الصف الأول الاعدادي – الفصل الدراسي الاول ساينس اولي اعدادي ترم اول In This part we will study : 3. Radiation Transfer of heat by radiation It is the transfer of heat from a hot object to another without any need for a material medium. – Heat is transferred by radiation through material media and non-material ones. – The heat is transferred from the heater by convection and radiation . There are a lot of technological applications that produce heat, but they are different in : 1. The energy resource that they depend on. 2. The kind of energy resource. 3. The effect on the environment. لمتابعة مستر احمد الباشا وكل ما يخص الساينس : جروب الفيس بوك http://bit.ly/2Of1mcN صفحة الفيس بوك http://bit.ly/2Gq5xMo بالتوفيق مستر احمد الباشا