Light Reflection | Grade 4 | Unit 1 - Concept 3 - Lesson 2 | Science скачать в хорошем качестве

Light Reflection | Grade 4 | Unit 1 - Concept 3 - Lesson 2 | Science

شرح ساينس الصف الرابع الابتدائي لغات - الفصل الدراسي الأول شرح ساينس رابعة ابتدائي - ترم أول لينك تحميل الملزمة https://drive.google.com/file/d/1NcI9... لينك تليجرام https://t.me/mrahmedelbashagroup In This lesson: Activity An experiment that shows how light interacts with different types of materials: Materials: a flashlight - a mirror - a piece of wood - a piece of plastic - a piece of metal - a piece of cloth - paper. Conclusions 1. Shiny and smooth materials reflect large amount of the light that falls on them, such as the mirror and the piece of metal. 2. Rough materials reflect small amount of the light that falls on them, such as the piece of wood, the piece of plastic, the piece of cloth and paper. Light Strikes Matter • Light is a form of energy that always travels in straight lines in the form of waves. When traveling light hits an object: Some of the light energy is absorbed by the object's surface . Some of the light energy reflects (bounces) off the object's surface. Some of the light energy may go through the object. According to the previous explanation, objects can be classified into two groups which are: Why do you see your body shadow? Your body is an opaque object that forms shadow, because the light that hits your body either bounces off or is absorbed but no light passes through your body. The direction of the reflected light rays depends on the smoothness of the surface, where: How does light striking matter make it possible for humans and animals to see? بالتوفيق مستر احمد الباشا