Once through the lens, the ray should pass through the principal focus. Draw a ray which passes from the object through the centre of the lens. Some ray diagrams may also show a third ray.

Engineers and astronomers at the University of Utah have designed a unique new kind of telescope lens: a flat lens with microscopic etchings to refract light. If the concept can be scaled up ...

Ray diagrams can be used to show the ... see distant objects clearly but not nearby ones) telescopes cameras Eyes also contain a convex lens that can change shape, so it can produce focused ...

However, making telescopes that can peek deep into the cosmos is an incredibly technical and expensive task—but thanks to new research, that could change. Here's how an innovative flat lens ...

A stunning new image from the James Webb Space Telescope (JWST ... interest to astronomers is the nebula's faint, Venn-diagram-like structure — two rings of ejected material shaped by the ...