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12.將焦距為10公分的柱狀凸透鏡，等分為二部分後，使兩部分相距為0.1毫米，且對稱於原來的主軸，如右圖所示(橫剖面圖)。今將單色線光源S(發出波長7500埃的紅光)置於主軸上鏡前20公分處，則光屏上亮紋寬度為何？
編輯私有筆記及自訂標籤教甄◆物理科專業-101 年 - 鳳山高中代理教甄物理科#82281
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