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/sci/ - Science & Math

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4445865 No.4445865 [Reply] [Original]

http://physicsworld.com/cws/article/news/48882

Am I missing something here, this is amazing right? An LED that is 200% efficient and actually cools its surroundings. Why is nobody making much of a fuss over this, is there a catch?

>> No.4445877

>>4445865
>An LED that is 200% efficient
No

>> No.4445887

>>4445877
Did you even read the article?

>> No.4445892

>>4445887
No.

>> No.4445908

>>4445865
pretty neat

Still not so sure it doesn't violate 2nd law of thermodynamics, in which case they fucked something else up, but cool none-the-less.

>> No.4445924

It probably means ~200% more efficient than other LED's.

>> No.4445932

>>4445924
Nopee, they measured a 70 pW output with only a 30 pW input, with the rest coming from heat energy in its surroundings.

>> No.4445934

>>4445924
Nope, its 200% efficient

It probably used the heat surrounding the bulb to help emit light. The hotter the day, the brighter the light.

>> No.4445943

It's about fucking time we figured this out.

Jesus.

>> No.4445959

that's pretty fucking neat

>> No.4445976

The article explains it fine. It's just that they are using this number to get attention that it does waste energy to heat but does the opposite. Same energy in and out.

>> No.4445977

>extracting useful energy from ambient heat

Nope.

I don't even need to read the article. If that's what is (ie not misquoted), it's just wrong and that's that.

>> No.4445988

>>4445977
This, I don't read articles with sensationalist titles, it's just insulting to my intelligence.

>> No.4446002

>>4445988
>Insulting to my intellgence
>I'll show them, by not reading!

GG.

>> No.4446008

>>4445977
>>4445988

I'm pretty sure from the article that it is in fact what its doing, I'd be happy to link the research paper if your feeling too pretentious to read a simple physics article. I wouldn't want to insult your clearly higher intelligence.

>> No.4446093

>>4446002
It's more like
>read hundreds of sensationalist titled articles
>they always have some stupid semantic bullshit and it's deliberately misinformative
>conserve time and energy by skipping all of them and going on to interesting shit or just relaxing instead

>> No.4446101

> At first glance this conversion of waste heat to useful photons could appear to violate fundamental laws of thermodynamics, but lead researcher Parthiban Santhanam of the Massachusetts Institute of Technology explains that the process is perfectly consistent with the second law of thermodynamics.


It kind of sounds like it's acting like a heat pump whose output is relatively narrow band radiation

>> No.4446131

>>4446093
The title is 'LED converts heat into light' not 'MIRACLE BREAKTHROUGH, SCIENTISTS SOLVE ENERGY PROBLEMS WORLDWIDE'

>> No.4446158

what the fuck is wrong with the people in this thread? you wont read it becasue you decide that ist imposable?

>> No.4446186

>>4446131
Still requires input of energy though, not that impressive. I can see your point though and it is valid.

>> No.4446191

>>4446186
>doesn't break physics
>not impressed

>> No.4446205

>>4446191
>put energy into a battery
>it gives out more energy
REVOLUTIONARY AM I RIGHT??

>> No.4446207

>>4446186
why don't you solve the world's energy problems then

>> No.4446208

>Converts heat to energy
>Claims 200% efficiency simply because it's output is greater than its electrical input

Fucking thermodynamics, how does it work?

>> No.4446209
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4446209

Behold, a light source that produces infinity times more light than the electricity it uses and actually cools its surroundings. Can I has Nobel Prize now?

>> No.4446222

>>4446207
Ok, LFTR

That was easy

>> No.4446229

>>4446208
It says its "conventional efficiency" is greater tahn 200%.
The key word being "conventional". Of course energy is conserved.

>>4445988
>>4446093
The title isn't sensationalist at all. The article is called "LED converts heat into light".

>> No.4446231

lmao

>> No.4446235

>>4446208
um, they mention that the efficiency as measured in the conventional way using the input electricity and output energy is 200%. thats what this is about.

>> No.4446242

>>4446209
>>4446209
>missing the point

>> No.4446286

>>4446158
>what the fuck is wrong with the people in this thread? you wont read it becasue you decide that ist imposable?

Welcome to /sci/, you should get used to this kind of behavior if you're going to stay here.

>> No.4446300

>>4445934
that makes absolutely no fucking sense, it would mean it's a light bulb that reverses entropy

i am forcefully reminded of the "thorium car" that shot lasers at thorium flakes to produce heat without any fission products, which violates so many principles it's borderline frightening
surprise! the entire thing was a scam for investor dollars.

>> No.4446303

>>4446158
we deal with so much bullshit bunk science every day, can you blame us for being cynical, especially since this just screams bullshit?

>> No.4446328

>>4446303
>>4446300
how is this any harder to except than having a normal heated object give of photons, the photons are just helped a bit with electricity in this.

>> No.4446330

>>4446328
*accept