A stunning new image from the James Webb Space Telescope reveals a cosmic mirage known as an Einstein ring, where the light ...

Scientists have developed an impossibly thin telescope lens that addresses a key astronomical challenge in a new study funded ...

Needless to say, the views we get through modern lenses are a lot more realistic. So how did we get from simple magnifying systems to the complex lens systems we see today? We start with a quick ...

A major realization of Einstein’s general relativity is the fact that massive objects warp space-time in a way that is similar to a lens, magnifying and shifting the light of background objects.

From the hand-held magnifying lenses used by Italian artists and scholars in the 13th Century, to the invention of bifocal lenses by American statesman and inventor Benjamin Franklin in 1784 ...

Draw a ray which passes from the object through the centre of the lens. Some ray diagrams may also show a third ray. Only the person using the magnifying glass can see the image. The image cannot ...

Draw a ray from the object to the lens that is parallel to the principal axis. Once through the lens, the ray should pass through the principal focus. Draw a ray which passes from the object ...