In the fast-light regime, around ω 1, the gradient is steep, so the change of k (Δk fast) with n is small, whereas in the slow-light regime, which has a shallow gradient, around ω 2, a large ...

Some objects are opaque such as stone, metal and wood. This means light doesn't travel through them. Light bounces back off the object. On the other side of the object a shadow is formed.

A small international team of nanotechnologists, engineers and physicists has developed a way to force laser light into becoming a supersolid. Their paper is published in the journal Nature.

An odd solid that can flow like a fluid has been created from light for the first time. Studying it will help researchers better understand exotic quantum states of matter. “We actually made lig ...

A new 100 gigahertz chip that harnesses light – not electricity – to synchronise processors could unlock the future of high-speed AI computing, next-generation communications and remote ...

Seymour: Hello! Seymour Science here… today’s episode is all about where light comes from… with my expert friend, Albert! Albert: Hi Seymour! Pleasure to be here! Light is what helps us see ...