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題 名 | 以稜鏡色散對白光LED與鹵素燈之光譜分析及其教學應用=The Analysis of the Spectrums of White-light LED and Halogen Lamp by Prism Dispersion and Their Teaching Applications |
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作 者 | 梁立國; | 書刊名 | 物理教育學刊 |
卷 期 | 15:2 2015.01[民104.01] |
頁 次 | 頁97-105 |
分類號 | 336.5 |
關鍵詞 | 稜鏡色散; 熱輻射體; 紫外災難; Newton dispersion; Black-body radiation; The ultraviolet catastrophe; Stefan-Boltzmann Law; |
語 文 | 中文(Chinese) |
中文摘要 | 光源置於凸透鏡焦點附近,鏡後方是 5mm圓孔,利用兩個三稜鏡讓光作接近九十度的偏折,移動屏幕,白光 LED的明線光譜與鹵素燈的連續光譜被分析:一、屏幕遠離時, LED紅、藍、綠的圓逐漸析出,紅綠交匯處呈現黃色,藍圈以更快速度離開綠圈與紅圈是一有趣的景象,測量圈圈位置,可驗證各色光位置與波長的線性關係;二、觀察鹵素燈,屏幕遠離時,眾多圈圈交匯的白光變淡,各色層亦逐漸析出,此時,在藍紫的一方,光強度突然暗淡許多,古典理論的解釋在此遇到烏雲,這是近代物理的重要歷程「紫外災難」,鹵素燈為一近似黑體輻射源;依據 Stefan-Boltzmann Law關於熱輻射功率的關係式,操作電源,可模擬與認識熱輻射體頻譜峰值與色溫的關係。 |
英文摘要 | In this study, a light source is placed near the focus of a convex lens. Behind the lens, there are 5-mm holes and two prisms. The spectra of a white-light LED and a halogen lamp are analyzed. For the LED, different colors disperse when the screen shifts away. The intersection of red and green is yellow. We can calculate the wavelength of the different colors using the linear method from the measurements of the position of the circles. Different colored circles gradually appear when we observe the spectrum of the halogen lamp in the same way. We can easily find that the light strength becomes suddenly dim in the blue-violet area. This is the " ultraviolet catastrophe " phenomenon that cannot be explained by the classical theory in the history of modern physics. A halogen lamp is a radiation source of blackbody. We can operate the power of the lamp according to the Stefan-Boltzmann Law to present different colored lights and different spectrum distributions at different temperatures. |
本系統中英文摘要資訊取自各篇刊載內容。