Why are there two different lens formulas? The one in my Physics book says the formula is 1/f=1/v+1/u but on the internet I found the formula as 1/f=1/ v-1/u? How are there two
![Can we derive the mirror and the lens formula the mirror formula is 1/v+1/u= 1/f the lens formula - Science - Light - Reflection and Refraction - 10024769 | Meritnation.com Can we derive the mirror and the lens formula the mirror formula is 1/v+1/u= 1/f the lens formula - Science - Light - Reflection and Refraction - 10024769 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/discuss_editlive/2955358/2013_12_12_11_57_52/convex.jpg)
Can we derive the mirror and the lens formula the mirror formula is 1/v+1/u= 1/f the lens formula - Science - Light - Reflection and Refraction - 10024769 | Meritnation.com
What is the proof of the thin lens equation [math]\dfrac{1}{u}+\dfrac{1}{v }=\dfrac{1}{f}[/math]? - Quora
![Derive lens formula, that is 1/v - 1/u = 1/f - Science - Light - Reflection and Refraction - 1821580 | Meritnation.com Derive lens formula, that is 1/v - 1/u = 1/f - Science - Light - Reflection and Refraction - 1821580 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/discuss_editlive/2191102/2012_02_26_00_55_31/2-26-2012%2012-56-56%20AM_1.png)
Derive lens formula, that is 1/v - 1/u = 1/f - Science - Light - Reflection and Refraction - 1821580 | Meritnation.com
![उत्तल लेंस के लिए सूत्र 1/f = 1/v – 1/u की स्थापना कीजिए, जहाँ प्रतीकों के सामान्य अर्थ हैं । Answer... CLASS-12 भौतिकी हिंदी माध्यम नोट्स PHYSICS Question answer ... उत्तल लेंस के लिए सूत्र 1/f = 1/v – 1/u की स्थापना कीजिए, जहाँ प्रतीकों के सामान्य अर्थ हैं । Answer... CLASS-12 भौतिकी हिंदी माध्यम नोट्स PHYSICS Question answer ...](https://www.mpboardonline.com/answer/class-12-physics-hm/img/89-1.jpg)
उत्तल लेंस के लिए सूत्र 1/f = 1/v – 1/u की स्थापना कीजिए, जहाँ प्रतीकों के सामान्य अर्थ हैं । Answer... CLASS-12 भौतिकी हिंदी माध्यम नोट्स PHYSICS Question answer ...
![Derive the thin lens formula i.e. 1/v - 1/u = 1/f for a convex lens when it forms a real image . - Brainly.in Derive the thin lens formula i.e. 1/v - 1/u = 1/f for a convex lens when it forms a real image . - Brainly.in](https://hi-static.z-dn.net/files/d71/feb7a37edb10317ddc401b6ab6c7927e.jpg)