Scientists at the University of Birmingham have designed a lens using metamaterials that can function as a convex or a concave lens, according to research published in the journal Nature ...

In a ray diagram, a concave lens is drawn as a vertical line with inward facing arrows to indicate the shape of the lens.

It uses the concept of periscope zoom lenses but skips out on the complex concave and convex lens assembly. Instead, it uses the prism to reflect light multiple times within a smaller footprint ...

The telescopes used two lenses, the objective lens (convex) and the eyepiece (concave). Thanks to the refracting telescope's structure, lenses could focus the light and make distant objects look ...

Linköping University researchers achieve a tenfold performance boost in conductive polymer metasurfaces, advancing the field ...

Convex and concave lenses can both be used to correct ... This is corrected by using a concave or a diverging lens. People who are ‘long sighted’ can see distant objects clearly, but they ...