畫圖個陣，俾左個point 係lie on the principle axis 既，然後要你畫兩條ray 去form image
中間係convex lens ， focal length係20 ，distance係36
咁點畫個兩條ray? 講步驟plz...
physics
2006-12-14 4:01 am
回答 (1)
2006-12-14 4:09 am
✔ 最佳答案
1. 由個object頂畫一條斜直線穿過principle axis上面果點, 畫長d2. 由個object頂畫一條平行於principle axis既線, 到達位於principle axis上面果點時(即係lens既中間點), 畫一條斜直線穿過focal length果點
3. 兩條線相交果點, 就係image formed果點
2006-12-13 22:16:06 補充：
sorry = ="you can check herehttp://webphysics.davidson.edu/applets/Optics/prb8.html
參考: physics書
收錄日期: 2021-04-13 14:21:21
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061213000051KK03812