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أرشيف المنتدي هنا نقل الموضوعات المكررة والروابط التى لا تعمل |
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أدوات الموضوع | ابحث في الموضوع | انواع عرض الموضوع |
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الوحدة الاولى كاملة Science 5 اتصل على 01144290605
الوحدة الاولى كاملة Science 5 اتصل على 01144290605 Lesson “1”Light It is the light energy that can be seen. - The Sun is the main source of light on Earth. The properties of light G.R: The formation of images through narrow holes: Because light travels in straight lines. - The image is minimized and inverted. - Formation of shadow.: : Because light travels in straight lines. - Shadow: It is the darkened area which is formed as a result of falling light opaque object. 2- Transmitting of light through different materials. A- Transparent materials: B- Semi-transparent materials: C- Opaque materials Ex.: Clear glass - Clear water-Air. Ex.: Tissue paper. Don’t allow light to pass - Ex.: Wood - people. Because they don’t allow light to transmit through and objects can’t be seen behind them. · The clear glass is a transparent material. Because it allows most light to pass through and objects can be seen clearly through them. 3- The light reflection. It is the bouncing (returning back) of light rays when light falls on a surface. Light reflection can be divided into: Regular reflection: Irregular reflection: It is the reflection of light when it falls on a smooth and shiny reflecting surface light rays are reflected in one direction. It is the reflection of light when it falls on a rough reflecting surface the light rays are reflected in different directions. It is the change in the direction of light rays when light passes through the separating surface between two transparent media due to the change in the light speed. - The light speed through air is faster than that through water) - So this change in the speed of light rays causes their refraction (Changing in their direction) and seeing the pencil broken. G.R.: A spoon appears broken. Due to the refraction of light. 5- Separation (splitting) of light. White light consists of seven spectrum colors, we can separate it into seven colors by a glass prism. It is the separation of white light into seven colors called spectrum colors. - White light can be also ****yzed into the seven spectrum by the drops of rain water. - The seven spectrum colors: Red – Orange – Yellow – Green – Blue – Indigo - Violet |
العلامات المرجعية |
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