General Science Physics Optics

କୌଣସି ଲେନ୍ସ ର କ୍ଷମତା ନିମ୍ନ ସମ୍ବଦ୍ଧ ଦ୍ଵାରା ଦିଆଯାଏ (ଯେଉଁଠାରେ f ଲେନ୍ସ ର ଫୋକସ ଦୂରତା ଅଟେ) ?

1
\(P=\frac{1}{f^2}\)
2
P = f
3
\(P=\frac{1}{f} \)
4
P = f2

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