ChemistryAndPhysicsAreFun
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Changing the wavelength of a light-emitting diode with liquid nitrogen
May 28, 2017 6:22 AM
ChemistryAndPhysicsAreFun
95417
1417
28
putitinputin
I read emitting dildo
MarioAndLuigisItalianBalls
That was cool. Bow try waving the changelength of a nitrogen-emitting light with liquid diodes.
AndreaLF
Green light means go.
medici
That is so cool!
theramattack
I believe the channel is called carsandwater
Kasarthic
SCIENCE!!!!
ActualTttony
And that tiny am out of heat is enough to speed the evaporation of the liquid. Cool.
kptainamerica
You can just say LED ya know.
floridaguy5867
Cool
KotalDom
Sharples1997
Username checks out
TristanEA
The name Of The YouTube channel is styropyro
TristanEA
https://youtu.be/5PquJdIK_z8
ehhhidunno
It's flubber!!
Baebladee
I know most of those words
ReallyFastSloth
We should rename scientists to sorcerers, cause this shit looks fantastic
theUniverseMomentum
*cue famous quote about magic being indistinguishable from science*
IamAlexander
I can do the same with my phone and the toilet. I can change the wavelength from to working to dead
ComfortablyNumbDK
That makes no sense
IamAlexander
yes
RemiRixJones
Porkchop01
does it stay that way permanently?
Dangermouse95
It won't. Once the LED returns to room temperature the wavelength (colour) of the light will go back to yellow.
DrKriegersClone
From the flickering at the end, I think it might have damaged the LED as well.
JukeJoint101
Bases on op's explanation in reply to another comment, my guess is no.
ChronoKing
No, the gif repeats
RemiRixJones
Porkchop01
ItIsAlrightChill
I read this in Leslie Nielsen's voice
St0ckh01m5yndr0m3
Then they add corn syrup and that's how they made Surge.
6pace
lol
Orpheus
You mean Slurm
deadandvogue
Can confirm. Worked at the Surge Shack in six flags.
Baromian
Just as delicious as I remember I swear I can chew on the suspended sugar crystals.
yzrocketman
I can get behind that statement.
Baebladee
Seems legit
iamkyleh
The game looked like something i would see for 20 bucks on psn, instead of a full price title, same with friday the 13th
HazyWasabi
I think you got the wrong surge https://en.m.wikipedia.org/wiki/Surge_(soft_drink)
WrathCore696
Yeah i think they did
McAwesomeguy
We still have surge in Norway! Called urge now tho the s fell off
computerphile
Norwegian Urge isn't made with corn syrup though. Real sugar, all the way. Unless you buy the new sugar free Urge..
Stostri
Mix it with tequila
HitchikerGuidingTheGalaxy
*make. They still produce it and we carry it at our store :D
computerphile
Norwegian Urge isn't made with corn syrup though. Real sugar, all the way. Unless you buy the new sugar free Urge..
HitchikerGuidingTheGalaxy
Yeah we’re in America so everything has corn syrup instead of sugar sadly. But I agree real sugar anything tastes way better
computerphile
From what other Americans have told me, they are able to buy Mexican Coke (glass bottles), and they are made with real sugar.
HitchikerGuidingTheGalaxy
It’s funny you mention that because we also carry those at my store but they have to be shipped directly from coke or be found at certain
HitchikerGuidingTheGalaxy
2/ stores but even then they’re more expensive and somewhat difficult to find. It’s much easier to get normal American come sadly
IwishIwasJamesBond
explanation please
Nothingbutahealthyintrest
Science..
JukeJoint101
It's the secret of the ooze!
patotheduck
It got angry.
DrDoucheBag
Light is emitted when an electron and positive charge combine. By cooling the amount of energy to combine them increases, and the light [1]
TheMispelledGod
comes to take you to hell. This is witchcraft [2/2]
DrDoucheBag
'Blue shifts' which changes the color towards a higher energy light. Red = lowest; Violet = Highest. The order is ROY G BIV.
Hoop66
errm....no.
DrDoucheBag
Yarp
DrDoucheBag
Blue light has a greater energy associated with a single photon than red light. Has to do with their frequencies. Larger energy= bluer light
RemiRixJones
ChemistryAndPhysicsAreFun
Cooling makes the lattice constant smaller, which increases the semiconductor band gap and decreases the wavelength produced by the LED.
Molvanian
Lattice Constant: Basically arrangement of tiny stuff, it gets closer together.
dragonmyballs
Dumb it down
medici
Your name checks out OP.
Azerai
Science!
Molvanian
Simple explanation: Cold makes the light making part smaller, which changes how electricity flows through it, changing the color.
MrStLouis
Is the lattice constant changing that much? I thought it would be related to having less heat contribute to electron energy, effectively...
MrStLouis
...making the led band gap larger and emitting higher energy photons
Molvanian
Band Gap: Place in molecule where no electrons can go (Though how this changes the color is beyond me, I'm comp sci, not physics.)
notaballoon
Electrons need energy to cross the band gap. Larger band gap=more energy=bluer light
Molvanian
Cool. So expending more energy shortens the wavelength of the released light?
MidiMidori
Less explanation please
NairouTryyshokk
Magic
WorkerLurker
Turns shit green yo
VillainousFiend
Liquid nitrogen is cold so it makes things more blue.
Spearka
cooling make emittey part different which make light go different
ughthisblows
Just right
ApplebeesOfficial
Your asshole puckers when it's cold, the LED did that on an atomic scale. Tighter atoms = electrons dont have to jump as far = ...
SenorBulbasaur
ApplebeesOfficial
Smaller light wave, and green is a shorter wavelength than yellow.
jofo97
And now less pretentious: cooling changes the properties of the led. Electrons in the material slow down, so that the light they emit [1]
uzerok
But it has really nothing to do with electron mobility. It's the energy loss of the electron jumping the band gap, emitted as a photon.
jofo97
I know that the band gap is temperature dependent, that the vibration of the atoms in the semiconductor decreases, and so also their [1]
jofo97
distance, and that that increases the potential between two probable interatomic electron orbitals, so that a jump causes a more [2]
ComfortablyNumbDK
But the electrons doesn't slow down. Your explanation is wrong
St0ckh01m5yndr0m3
ChemistryAndPhysicsAreFun
Not too sure what you mean by pretentious. My explanation is pretty straightforward. I just explained what's happening here, that's all.
jofo97
But noone without a physics or chemistry degree will understand it. This is imgur, not J. Am. Phys.
sqlyoda
You are literally typing this comment from a machine that can define all of those not so big words you don't understand.
Molvanian
Pretentious is the wrong word, but as someone who took physics, that was a little out of even my league.
Supermutantvirus
I am sure that you are just lazy and could league it up with some minor effort.
TheDoctormoriarty
Not everyone understands some of those terms and.it helps to put it in laymans terms
LucianKane
If people don't understand, they have the internet available, we shouldn't be simplifying things too much