Jay481985 Posted March 9, 2012 Share Posted March 9, 2012 http://www.wired.co.uk/news/archive/2012-03/09/230-percent-efficient-leds MIT physicists have managed to build a light-emitting diode that has an electricalefficiency of more than 100 percent. You may ask, "Wouldn'tthat mean it breaks the first law of thermodynamics?" The answer,happily, is no. The LED produces 69 picowatts of light using 30 picowatts of power, giving it an efficiency of230 percent. That means it operates above "unity efficiency" --putting it into a category normally occupied by perpetual motionmachines. However, while MIT's diode puts out more than twice as muchenergy in photons as it's fed in electrons, it doesn't violate theconservation of energy because it appears to draw in heat energyfrom its surroundings instead. When it gets more than 100 percentelectrically-efficient, it begins to cool down, stealingenergy from its environment to convert into more photons. In slightly more detail, the researchers chose an LED with asmall band gap,and applied smaller and smaller voltages. Every time the voltagewas halved, the electrical power was reduced by a factor of four,but the light power emitted only dropped by a factor of two. Theextra energy came instead from latticevibrations. The scientists involved have detailed their discovery in a paper publishedin Physical Review Letters, saying: "Experimentsdirectly confirm for the first time that this behaviour continuesbeyond the conventional limit of unity electrical-to-optical powerconversion efficiency." 69 picowatts of light, of course, is a very small amount -- soyou're not likely to be able to read in bed with one of these LEDs.However, it could have applications in low-power electronics,acting as a thermodynamic heatengine but with fast electrical control. Quote Link to comment Share on other sites More sharing options...
Mallette Posted March 9, 2012 Share Posted March 9, 2012 Duh. Drool. I'm THINKING about it... Dave Quote Link to comment Share on other sites More sharing options...
JJkizak Posted March 9, 2012 Share Posted March 9, 2012 If it works with LED's then it should work with transmitters and a bunch of other things. JJK Quote Link to comment Share on other sites More sharing options...
Quiet_Hollow Posted March 9, 2012 Share Posted March 9, 2012 If it works with LED's then it should work with transmitters and a bunch of other things. It does. MIT isn't the first at everything. There's some wicked technology out there that's been around for the last 200 years or so. Stuff that'd make the everyday engineer giggle like a school girl and soil their pants. Very cool stuff indeed...but you'll never hear about it on the news, or even at the university level most of the time. Hint: 1st Law of Thermodymics depends solely upon what constitutes the ascribed boundary of a system. There's no law out there that says what exactly what that boundary has to be. Mother nature really doesn't care where we draw the lines in the dirt, we're still playing by her rules, in her sandbox. Quote Link to comment Share on other sites More sharing options...
Guest " " Posted March 9, 2012 Share Posted March 9, 2012 Im a wonder of science also, pound per pound I eat more than what I emit. Quote Link to comment Share on other sites More sharing options...
Jay481985 Posted March 10, 2012 Author Share Posted March 10, 2012 Duh. Drool. I'm THINKING about it... Dave I have no idea what you are talking about Quote Link to comment Share on other sites More sharing options...
Jay481985 Posted March 10, 2012 Author Share Posted March 10, 2012 If it works with LED's then it should work with transmitters and a bunch of other things. JJK Did you even read the article, it is the LED not anything else. Quote Link to comment Share on other sites More sharing options...
Jay481985 Posted March 10, 2012 Author Share Posted March 10, 2012 If it works with LED's then it should work with transmitters and a bunch of other things. It does. MIT isn't the first at everything. There's some wicked technology out there that's been around for the last 200 years or so. Stuff that'd make the everyday engineer giggle like a school girl and soil their pants. Very cool stuff indeed...but you'll never hear about it on the news, or even at the university level most of the time. Hint: 1st Law of Thermodymics depends solely upon what constitutes the ascribed boundary of a system. There's no law out there that says what exactly what that boundary has to be. Mother nature really doesn't care where we draw the lines in the dirt, we're still playing by her rules, in her sandbox. First why the chip on your shoulder. And second man up and show proof now. Don't leave us hanging. Quote Link to comment Share on other sites More sharing options...
Quiet_Hollow Posted March 10, 2012 Share Posted March 10, 2012 No chip intended. Just the way my words come across sometimes. [:$] I was reffering to MIT in the context that some people might consider that institution as the only pool of gifted and well-funded intellects in the world. Articles, like the original, appear to use MIT as a buzz word of sorts to justify the merits of the content. What would suffice as proof? There's Tesla's writing and patents, extensive research by the academic community, books, papers, numerous inventions. I can provide a few links to get you started down the trail, but really, all it takes is an open mind, a decent technical understanding, and lots of curiosity. Links below are only a smidgen of documentaries, in English...this type of research is, and has been happening globally for some time now. http://www.youtube.com/watch?feature=endscreen&NR=1&v=nA2KtZ45nXA http://www.icehouse.net/john1/ http://www.youtube.com/watch?v=w3SpL7WBHDE&feature=related http://www.youtube.com/watch?v=_jnaFlq2eEo Quote Link to comment Share on other sites More sharing options...
Mighty Favog Posted March 12, 2012 Share Posted March 12, 2012 I may be out in left field but as far as being more than 100% efficient I can't stop thinking of the typical car's ignition system. 12-volts going from the battery into the coil while 50k+ coming out on it when the points open and the field collapses. (expecting dope-slap now...) Quote Link to comment Share on other sites More sharing options...
Quiet_Hollow Posted March 12, 2012 Share Posted March 12, 2012 ...man up and show proof now. Don't leave us hanging. I had a nice lengthy reply to your message on Saturday...with lots of links and good stuff, but the Moderators intercepted it. [:#] I could try PM'ing or emailing you the info, but I'm not going to write another one-page paper, only to have it vaporize into thin air again.[^o)] Quote Link to comment Share on other sites More sharing options...
Jay481985 Posted March 12, 2012 Author Share Posted March 12, 2012 ...man up and show proof now. Don't leave us hanging. I had a nice lengthy reply to your message on Saturday...with lots of links and good stuff, but the Moderators intercepted it. I could try PM'ing or emailing you the info, but I'm not going to write another one-page paper, only to have it vaporize into thin air again. Its a problem with posting more than I believe 3-5 links. I usually just not link the link but copy paste it. If it gets spam blocked, email amy Quote Link to comment Share on other sites More sharing options...
fenderbender Posted March 12, 2012 Share Posted March 12, 2012 Im a wonder of science also, pound per pound I eat more than what I emit. I always knew you were full of $hit!!! Sorry.... you put the ball on the tee and handed me I club.... Quote Link to comment Share on other sites More sharing options...
Groomlakearea51 Posted March 15, 2012 Share Posted March 15, 2012 Im a wonder of science also, pound per pound I eat more than what I emit. I always knew you were full of $hit!!! Sorry.... you put the ball on the tee and handed me I club.... Nah, Fritzy is not violating the "law", his emissions also would include the heat from the reactor piles...... [] Quote Link to comment Share on other sites More sharing options...
oscarsear Posted March 15, 2012 Share Posted March 15, 2012 If these LEDs 'pull' heat energy from their environs and convert this thermal energy to photons would they not then be more accurately applied as electrodynamic heat sinks? Quote Link to comment Share on other sites More sharing options...
Islander Posted March 15, 2012 Share Posted March 15, 2012 If they're not scalable up to practical and useful size, they'll just be a lab novelty. Quote Link to comment Share on other sites More sharing options...
Mallette Posted March 18, 2012 Share Posted March 18, 2012 Duh. Drool. I'm THINKING about it... Dave I have no idea what you are talking about Elementary, my dear Dr. Jay. I was simply admitting that my limited physics is inadequate to form and share an opinion. I am not feeling TOO ignorant though as best I can tell the "real deal" physicists are struggling with it too. Dave Quote Link to comment Share on other sites More sharing options...
artto Posted March 23, 2012 Share Posted March 23, 2012 If it works with LED's then it should work with transmitters and a bunch of other things. It does. MIT isn't the first at everything. There's some wicked technology out there that's been around for the last 200 years or so. Stuff that'd make the everyday engineer giggle like a school girl and soil their pants. Very cool stuff indeed...but you'll never hear about it on the news, or even at the university level most of the time. Hint: 1st Law of Thermodymics depends solely upon what constitutes the ascribed boundary of a system. There's no law out there that says what exactly what that boundary has to be. Mother nature really doesn't care where we draw the lines in the dirt, we're still playing by her rules, in her sandbox. Ah! So that's why when I eat a 12 ounce bag of Doritos I gain 3LBS [^o)] Quote Link to comment Share on other sites More sharing options...
JJkizak Posted March 23, 2012 Share Posted March 23, 2012 You forgot to add the three pounds of beer that went with it. JJK Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted March 25, 2012 Share Posted March 25, 2012 cool, let me know when they make em big enough to light a stage and still look like light. Everybody looks purple these days. Quote Link to comment Share on other sites More sharing options...
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