A convex lens corrects long-sightedness ... Back to top The full-scale diagram below shows a converging lens and an object. Each principal focus is marked with an F: Draw two rays to find the ...

We compare and contrast concave and convex lenses by drawing ray diagrams. In this Closer Look segment on Lenses, we compare and contrast concave and convex lenses by drawing ray diagrams and ...

These lenses are either convex - converging light, which magnifies an object, or concave, where light diverges making an object smaller. However, this new lens is 40 nm thin on a flat glass surface .