Lens Formula
Defining the Lens Formula
LENS FORMULA
Like spherical mirrors, we have lens formula for spherical lenses. The lens formula gives the relationship among distance of the object (u), distance of the image (v) and the focal length (f) of the lens. It is expressed as
$$ \frac{1}{f} = \frac{1}{v} - \frac{1}{u} $$
Application and Key Considerations
It is applicable to both convex and concave lenses. We need to give an at most care while solving numerical problems related to lenses in taking proper signs of different quantities.