CBSE Class 10 Answered
A SCREEN IS PLACED 90 CM FROM AN OBEJCT. THE IMAGE OF THE OBJECT ON THE SCREEN IS FORMED BY A CONVEX LENS AT TWO DIFFERENT LOCATIONS SEPARATED BY 30 CM. FIND THE FOCAL LENGTH OF THE LENS.
Asked by sohamsouthpoint02 | 30 Dec, 2017, 01:28: AM
![](https://images.topperlearning.com/topper/tinymce/imagemanager/files/543128aa3f167294ca9fd8cbffd667e55a48a5995e6b65.26796354dec3103.png)
Answered by | 31 Dec, 2017, 02:25: PM
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