TOPICSLight
Light
Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that the human eye perceives. The primary properties of light are intensity, propagation direction, frequency or wavelength spectrum, and polarization. Light is a transverse wave and does not need any medium to travel. The speed of light in a vacuum is a fundamental physical constant, the currently accepted value of 299,792,458 meters per second. Light can also be described as a stream of photons, massless packets of energy.
Caltech’s nanoscale device can reflect and direct light in desired ways
The innovation is pointing the way to future wireless communication channels.
Miniature, implantable LED device fights cancer with light
Bringing light's benefits to these harder-to-access cancers.
A new property of light discovered
Photon momentum discovery unlocks novel, silicon-based optoelectronic capabilities.
Scientists successfully demonstrated quantum interference among several single photons
A leap forward in optical quantum computing.
Scientists visualized quantum effects in electron waves
Kapitza-Dirac effect used to show temporal evolution of electron waves.
Astronomers observed jets of matter being expelled 3X the speed of light
‘Cosmic Cannibals’ expel jets into space at 40% speed of light.
Improving quantum computing using polarization
Paving the way for quantum imaging in many different fields.
Scientists proved the fundamental limits of electromagnetic energy absorption
Mathematical solution evaded discovery for over two decades.
Recycling rare-earth phosphors from used fluorescent bulbs
A simpler way to collect slightly magnetic particles.