The emergence of convenient sources of broadband light spanning the visible and near-infrared is proving increasingly useful for applications involving spectroscopy, imaging and metrology ...

Lasers, LEDs and light sources are devices that create light. LEDs (light emitting diodes) convert an electrical current into light using spontaneous emission in optically active semiconductors.

Light is something we use and need every day. It is a form of energy that allows us to see all around us! Lots of different sources produce light. Earth's main source of natural light is the Sun.

We need light for our eyes in order to see, if they are able. Light sources can be natural such as the Sun, which is our main source of natural light, or from things burning. We also get light ...

Light is all around us, essential for one of our primary senses (sight) as well as life on Earth itself. It underpins many ...

Heat and light, in their application to the manifold ... of manganese and chlorate of potash—have ordinarily been the source of oxygen ; this gas can be evolved from them with ease ; however ...

For hundreds of a millions of years, the universe existed in the dark ages—an epoch when only primordial gasses existed. Then ...

They generate coherent light through the process of stimulated emission, similar to conventional lasers, but at a much smaller scale. Nanolasers have gained significant attention due to their ...

Light is electromagnetic radiation: basically, an electric wave and a magnetic wave coupled together and traveling through space-time. It has no mass. That point is critical because the mass of an ...