本資源的模擬動畫探究光線在兩種不同折射率的介質交界下折射的情況。當光由一光密介質射進一光疏介質，而又逐步增加入射角時，會出現全內反射的現象。本資源的模擬動畫亦能顯示空中的小水滴如何將光線折射而導致彩虹的形成。
學習重點：
學生能認識光線通過空氣和透明物質介界面時會產生折射。
教學建議：
- 教師可讓學生試玩本資源的模擬動畫，讓學生認識到光線在兩種不同折射率的介質交界下會出現折射的情況。
- 學生可自行選擇不同折射率的物質進行本活動，而這模擬活動能加深他們對「玻璃塊和光線箱」實驗的印象。
- 教師可透過選擇將光由一折射率較大物質射進折射率較少的物質，而又逐步增加入射角而向學生示範什麼是全內反射。
- 選擇左上角「稜鏡」選項，教師可透過選擇不同形狀的稜鏡向學生示範彩虹的形成。
使用說明：
本資源需配合 Java 外掛使用。
教師點擊入以上連結後可參考網頁下方的表格，內有不同語言內容版本的模擬動畫可供選擇。
下載 Java 外掛軟件
This resource is an interactive simulation which illustrates the refraction of light between two media with different refractive indices. When light passes from an optically denser to a less dense medium, and by gradually increasing the angle of incidence, it is possible to reveal the situation of total internal reflection in this interactive. The interactive also demonstrates how rainbows are formed when refraction of light occurs in water droplets in the air.
Learning Objectives:
Students should be able to recognize that light is refracted at the boundary between air and a transparent material.
Teaching Suggestions:
- Teachers may allow students to play this simulation to reveal that light can bend between two media with different indices of refraction.
- Students can choose the refractive index of material on the two different sides on their own. This can give students a deeper impression about the ray box and glass blocks experiment.
- By choosing light from passing from an optically denser to a less dense medium and increasing the angle of incidence gradually, teachers can show the situation of total internal reflection to students.
- By clicking the "Prism break", teachers may use prisms of different shapes to demonstrate the formation of rainbows to students.
User Tips:
Java plug in is required to play this resource.
Download Java plug in
