Radiation within the visible spectrum can appear black if it is low in power – more specifically, lower in power than its ...

Tunable lasing at around 405 nm is realised with an InGaN device featuring a narrow-ridge active channel and a periodically ...

The visible spectrum is the portion of the electromagnetic ... A typical human eye will respond to wavelengths from about 380 to 750 nm. In terms of frequency, this corresponds to a band in ...

These sources make use of optical nonlinear effects in specially designed optical fibres to create light with a wide spectrum ... to produce wavelengths shorter than about 450 nm.

As the U.S. continues to wait for newer sunscreen ingredients, patients should use tinted sunscreens to protect against visible light that causes photodamage, melasma and hyperpigmentation, according ...

Researchers have designed a single-photon time-of-flight LiDAR system that can acquire a high-resolution 3D image of an object or scene up to 1 kilometer away, which could help enhance security, ...