![List four precautions a student should observe while determining the focal length of a given convex lens by obtaining the image of a distant object on a screen. List four precautions a student should observe while determining the focal length of a given convex lens by obtaining the image of a distant object on a screen.](https://www.vedantu.com/question-sets/433569ab-3995-4e8a-8e15-9c0b0aa238d86110662179537359721.png)
List four precautions a student should observe while determining the focal length of a given convex lens by obtaining the image of a distant object on a screen.
What would be the ratio of object distance to the focal length of convex lens in order to obtain real image of double size? - Quora
![Displacement Method for finding Focal Length of Convex Lens Class 12Optics @Kamaldheeriya Maths easy - YouTube Displacement Method for finding Focal Length of Convex Lens Class 12Optics @Kamaldheeriya Maths easy - YouTube](https://i.ytimg.com/vi/QvTNJ-oRsV4/maxresdefault.jpg)
Displacement Method for finding Focal Length of Convex Lens Class 12Optics @Kamaldheeriya Maths easy - YouTube
![the lens. Then " m -m WE-80: A biconvex lens of focal length 15 cm is in front of a plane mirror. The distance between the lens and the mirror is 10 the lens. Then " m -m WE-80: A biconvex lens of focal length 15 cm is in front of a plane mirror. The distance between the lens and the mirror is 10](https://toppr-doubts-media.s3.amazonaws.com/images/1645592/8d2be5f7-0235-4418-aff7-da1310ef0a45.jpg)
the lens. Then " m -m WE-80: A biconvex lens of focal length 15 cm is in front of a plane mirror. The distance between the lens and the mirror is 10
![A) Example of a convergent biconvex lens. (B) Example of a divergent... | Download Scientific Diagram A) Example of a convergent biconvex lens. (B) Example of a divergent... | Download Scientific Diagram](https://www.researchgate.net/publication/7479121/figure/fig6/AS:668483411009540@1536390273267/A-Example-of-a-convergent-biconvex-lens-B-Example-of-a-divergent-biconcave-lens.png)