初中科學科 2024 最新教學支援（中三）

改善圖文配置，幫助學生理解 ▲ 跨頁設計展示人體的消化系統，一眼掌握內容概覽 ▲ 一圖看清反射和折射所需學習的詞彙 • 增加所需詞彙定義 • 加入數字排列，方便順序閱讀 • 排列整齊，便於閱讀 air glass angle of incidence incident ray angle of reflection reflected ray normal In general, Terms Before we move on, let’s learn some words about refraction. Refraction can also occur when a light ray travels from one medium to another. Travelling from air to another medium is just one case. Fig. 14.14 Terms used in refraction boundary 界面 refracted ray 折射線 angle of refraction 折射角 Note that the light ray is partially reflected. For simplicity, we do not draw this reflected ray on the diagrams in this section. Revise the terms angle of incidence, angle of reflection, reflected ray and normal (p. 11), if necessary. The boundary is the line between the air and the medium (e.g. glass). Note that the normal is perpendicular to the boundary. The refracted ray is the light ray that goes into the medium (other than that the incident ray travels through) . The angle of refraction is the angle between the refracted ray and the normal. Refraction of light is the bending of a light ray when it travels from one medium to another. 23 14 Light, Colours and Beyond M01_IS2018_E_SB_3CHKG_9878_U14-3.indd 23 2019/5/8 下午5:07 In general, Terms Before we move on, let’s learn some words about refraction. Refraction can also occur when a light ray travels from one medium to another. Travelling from air to another medium is just one case. Fig. 14.14 Terms used in refraction boundary ޢ ࠦ refracted ray ұ࢛ᇞ angle of refraction ұ࢛ԉ Note that the light ray is partially reflected. For simplicity, we do not draw this reflected ray on the diagrams in this section. Revise the terms angle of incidence, angle of reflection, reflected ray and normal (p. 11), if necessary. Refraction of light is the bending of a light ray when it travels from one medium to another. air glass angle of TGƝGEVKQP TGƝCEVGF ray normal 1. The incident ray is the light ray from one medium falling on the boundary. 2. The angle of incidence is the angle between the incident ray and the normal. 3. The boundary is the border between two media (e.g. air and glass). 4. The normal is the line perpendicular to the boundary. 5. The refracted ray is the light ray that goes into the medium (other than that the incident ray travels through). 6. The angle of refraction is the angle between the refracted ray and the normal. 23 14 Light, Colours and Beyond M01_IS2018_E_SB_3CHKG_6397_U14-3.indd 23 14/2/2024 下午3:32 原版 重印兼訂正版本