By carefully placing nanostructures on a flat surface, researchers at Linköping University, Sweden, have significantly ...

By carefully placing nanostructures on a flat surface, researchers have significantly improved the performance of so-called optical metasurfaces in conductive plastics. This is a major step for ...

Refractor to reflector, Schmidt-Cassegrain to Maksutov-Cassegrain - this is everything you need to know about the different types of telescopes ... shaped mirrors and lenses (or a combination ...

Converging (convex) lenses are used in reading glasses. A short-sighted person can see close objects clearly (they have good short sight), but they can’t see distant objects clearly. A short ...