Question

what is a formula for lens​

Answer 1

Answer:

(1/v-1/u= 1/f)

I hope that this answer will help you.

Answer 2

• According to the converging lens equation, the lens formula is $\frac{1}{f} =\frac{1}{v}+ \frac{1}{u}$

• It relates the focal distance of a lens with the space of the associate object that is placed before it.
• Consider associate extended object AB placed before a converging lens. Let O be the optical center of the lens. once the item AB is commanded about to the lens between O and F the image A'B' shaped by the converging lens is virtual, erect, and increased.
• Convex lenses square measure utilized in eyeglasses for correcting hypermetropia, wherever the space between the eye's lens and tissue layer is just too short, as a result, that the focus lies behind the tissue layer.