(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
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Researchers are developing drones that could detect plant disease before any visible signs show, allowing farmers to stop infections in their tracks.
Ecology
Apr 26, 2017
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943
New solar cells could increase the maximum efficiency of solar panels by over 25%, according to scientists from the University of Cambridge.
Nanophysics
Feb 8, 2012
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Researchers from the Institute of High Energy Physics of the Chinese Academy of Sciences examined the validity of the theory of relativity with the highest accuracy in a study entitled "Exploring Lorentz Invariance Violation ...
General Physics
Feb 15, 2022
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A black hole, at least in our current understanding, is characterized by having "no hair," that is, it is so simple that it can be completely described by just three parameters, its mass, its spin and its electric charge. ...
Astronomy
Jun 15, 2020
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452
New research from Tel Aviv University will allow cameras to recognize colors that the human eye and even ordinary cameras are unable to perceive.
Optics & Photonics
Nov 5, 2020
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1862
The James Webb Space Telescope lit up 2022 with dazzling images of the early universe after the Big Bang, heralding a new era of astronomy and untold revelations about the cosmos in years to come.
Astronomy
Dec 7, 2022
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160
Astronomers have made a rare discovery in the early universe involving two actively feeding supermassive black holes—or quasars—just 10,000 light-years apart from each other, that are on the verge of a colossal collision.
Astronomy
Apr 5, 2023
1
199
This new NASA Hubble Space Telescope image of IC 4271, also known as Arp 40, is a curious pair of spiral galaxies some 800 million light-years away. The smaller galaxy is superimposed on the larger one, which is a type of ...
Astronomy
May 23, 2022
0
109
A team of Columbia Engineering researchers has invented a technology—full-duplex radio integrated circuits (ICs)—that can be implemented in nanoscale CMOS to enable simultaneous transmission and reception at the same ...
Telecom
Mar 13, 2015
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