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新教科版科學(xué)5上1.7《制作一個潛望鏡》實驗報告
潛望鏡的結(jié)構(gòu)
潛望鏡中有同一方向放置的兩個平面鏡，代表光照射下的物體經(jīng)過兩次反射后進入人的視野。?
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3.潛望鏡的工作原理：
潛望鏡是利用兩個反射鏡使物體的光線經(jīng)兩次反射而折向眼中，潛望鏡之所以可以從下邊看到上面的情況并且十分清楚，是因為兩塊平面鏡互相平行，并且都與水平方向呈45度夾角，外面的景象通過平面鏡的兩次反射成像，從而讓我們從下面看到了上面的景象。
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4.制作簡易潛望鏡
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制作材料：紙盒、鉛筆、直角三角板、剪刀、鏡子等等。
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制作方法：
①在紙盒兩個長邊距邊緣約一厘米處各畫一條直線。
②用直角三角板在紙盒的兩端距邊緣約一厘米處各畫一條斜線。
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③在紙盒的對應(yīng)面上重復(fù)畫上面的線。
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④用剪刀將4條斜線剪開。
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⑤像圖中那樣將兩面鏡子插入紙盒開口處，并保持鏡子的反射面是相對的。
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⑥在鏡子的反射面前各開一個窗口。
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