Question

lens ki chamta se aap kya samajhte hai tatha iska Sutra likhiye

Answer 1

Lens ki chamta is the hindi translation of the scientific term "power of the lens"
It is directly proportional to 1/f(where f is the focal length in meters)

Answer 2

Lens ki kshamta- lens ki kshamta uski meter mein mapi gyi focus doori k vyutkrm k brabar hoti h.

Lens ki kashmta brabar=1/f(meter)

ye sutr tab lagega Jab focus doori meter mein Di ho.

1/f(cm ) Jab focus doori centi meter mein ho tab iska use krenge

I hope it will help you......