(PhysOrg.com) -- Monochromatic light-emitting diodes cover a large part of the visible spectrum with high effi-ciency. For blue light, nitride diodes achieve external quantum efficiencies in excess of 65%, i. e., one photon ...
Condensed Matter
Jul 23, 2009
1
2
Artists, print designers and interior decorators have long had access to a broad palette of paint and ink colors for their work. Now, researchers have created a broad color palette of electrochromic polymers, materials that ...
Polymers
Feb 9, 2015
0
62
With morning and nighttime routines alone, people spend plenty of time looking in the mirror, but did you know the history of this everyday item dates to 4000 B.C.?
Optics & Photonics
Jul 5, 2022
1
40
There's an old head-scratcher that asks whether the refrigerator light really goes out when you close the door.
Biotechnology
Jul 23, 2013
1
0
(Phys.org) -- A team of researchers in Australia has shown that the evolution of flowers in that country was driven by the preferences of bees, rather than the other way around. In their paper published in the Proceedings ...
(PhysOrg.com) -- Finally, an optical frequency comb that visibly lives up to its name. Scientists at the University of Konstanz in Germany and the National Institute of Standards and Technology in the U.S. have built the ...
General Physics
Oct 29, 2009
0
0
Sharp Corporation has developed a five-primary-color display that faithfully reproduces the real surface colors that humans are capable of perceiving. A prototype of this display will be exhibited at the international symposium ...
Hardware
May 29, 2009
2
0
Scientists study the movement of charge carriers to design an organic LED that is energy efficient and still casts a warm, natural glow.
General Physics
Feb 1, 2012
4
0
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
Optics & Photonics
Feb 12, 2018
1
240
Sparks are a fascinating phenomenon well-known from campfires, flint stones and electric sparklers and other pyrotechnic articles. Looking at sparks more closely reveals the limited colors in which they appear. Dark red-orange ...
Materials Science
Mar 26, 2019
0
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