News tagged with illumination

City lights could reveal E.T. civilization

In the search for extraterrestrial intelligence, astronomers have hunted for radio signals and ultra-short laser pulses. In a new paper, Avi Loeb (Harvard-Smithsonian Center for Astrophysics) and Edwin Turner ...

Nov 03, 2011
4.6 / 5 (29) 54 | with audio podcast

New inexpensive solar cell design

One of the most promising technologies for making inexpensive but reasonably efficient solar photovoltaic cells just got much cheaper. Scientists at the University of Toronto in Canada have shown that inexpensive nickel can ...

Aug 03, 2010
4.8 / 5 (15) 0 | with audio podcast

Plasmonics: Growth lamps for nanoparticles

Just as gardeners can use 'growth lamps' to stimulate plant growth, materials scientists can now promote uniform growth of decahedron-shaped silver nanoparticles while they are in solution. These 10-faced ...

Oct 10, 2012
not rated yet 0

Billion people invited to switch off lights

Around a billion people living in the world's major cities are being invited to turn off their lights at 8:30 p.m. local time on Saturday for "Earth Hour," described as the biggest mass campaign to demand ...

Mar 26, 2009
3.1 / 5 (15) 6

Mini beamer in a cellphone or PDA

(PhysOrg.com) -- Looking at photos on a cellphone display can be somewhat arduous. A new mini beamer will make it easier. The beamer is so small that it can be integrated in a cellphone or a PDA. As it does ...

Jun 02, 2009
4 / 5 (1) 2