Why can we see a magnified, upright image by using a magnifying glass when we hold the magnifying glass close to the object?
Why can we see a diminished, inverted image by using a magnifying glass when we hold the magnifying glass far away from the object?
The working principle of a magnifying glass
2007-03-08 5:25 am
回答 (2)
2007-03-09 12:36 am
✔ 最佳答案
如果近個 object, 意思係, 個 object distance < focal length, 那麼 image 會係 virtual, enlarged 同 upright. 而當 object distance 遠過 focal length, 那麼 image 會係 real, diminished 同 inverted. 可以參看呢條 link 入面 Imaging properties 的 section 頭兩幅圖.http://en.wikipedia.org/wiki/Lens_(optics)
2007-03-19 8:20 am
首先應該指出放大鏡是凸透鏡的一種。
其次，資料不完全正確。當物距小於焦距兩倍並大於焦距，會形成放大且倒置的實像。
其次，資料不完全正確。當物距小於焦距兩倍並大於焦距，會形成放大且倒置的實像。
收錄日期: 2021-04-12 21:53:41
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070307000051KK03940