Question

what is lens formula

Answer 1

Lens formula us 1/v-1/u=1/f
Mirror formula is 1/v+1/u=1/f
Hope this helps.
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Answer 2

✨✔️✔️ HERE IS YOUR ANSWER....

✔️ Relationship between object distance (u), image distance (v) and the focal length (f) is referred to as lens formula.

✔ ️$\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$

✨✔️✔️HOPE IT HELPS YOU...
✌❤✌