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![[Post New]](/templates/default/images/icon_minipost_new.gif) 25 Mar 2008 10:39:02 IST
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Can ny1 plz xplain me wots
1. Heisenberg's Uncertainty Principal nd its significance
2. Hydrogen Atom and Schrodinger Eguation
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 25 Mar 2008 10:47:27 IST
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heisenberg's uncertainty principle states u cant measure the position and velocity of a moving object simultaneously accurately.
(change in position)(change in momentum) >= h / 4pi
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1st year,
B.Tech ( CSE ) ,
NIT-Trichy.
"There are no accidents in my philosophy. Every effect must have its cause. The past is the cause of the present, and the present will be the cause of the future. All these are links in the endless chain stretching from the finite to the infinite." - Abraham Lincoln |
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 25 Mar 2008 10:51:42 IST
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since no one has seen atoms there are many assumptions now if u want to find the velocity of a ball at a particular position u can visualise and apply some formula and get it. if u cant even see an atom how to calculate the exact velocity of it at particular position this is what heisenberg uncertainity principle states it states that the actual velocity and position of the electron cannot be calculated simultaneously
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 25 Mar 2008 10:51:58 IST
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heisenberg's uncertainity principle talks about the uncertainity in position and momentum of any particle... i'm not stating it in exact form.... heisenberg found out that if they use a wave of long wavelength... then position of particle cannot be determined accurately.. but momentum is determined accurately....... if wave of short waveleght is used.. then position is determined accurately.. but not momentum..... and uncertainity in momentum and position is always greater than or equal to h/4pi
hydrogen atom is the most basic stable atomic structure which has just one proton and and an electron...
shrodinger wave equation is the equation of wave proposed by sir shrodinger for electrons in shell........ but i dont understand the equation completely....
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size doesnt matter, brains do...
vignesh |
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 25 Mar 2008 11:07:23 IST
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Any1 more whu can xplain me sumthng bout
Schrodinger Eguation
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 25 Mar 2008 11:19:52 IST
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Schrodinger Equation The Schrodinger equation plays the role of Newton's laws and conservation of energy in classical mechanics - i.e., it predicts the future behavior of a dynamic system. It is a wave equation in terms of the wavefunction which predicts analytically and precisely the probability of events or outcome. The detailed outcome is not strictly determined, but given a large number of events, the Schrodinger equation will predict the distribution of results.  The kinetic and potential energies are transformed into the Hamiltonian which acts upon the wavefunction to generate the evolution of the wavefunction in time and space. The Schrodinger equation gives the quantized energies of the system and gives the form of the wavefunction so that other properties may be calculated.
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dont worry .
be happy and positive
nd nvr stop bcz life cant wait.
nd watever happens keep smiling bcz log haste huye btr lagte hain.try to fight wid d situation
nd tc of urself bcz u r spl to someone out dere |
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 25 Mar 2008 11:23:08 IST
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At the beginning of the twentieth century, experimental evidence suggested that atomic particles were also wave-like in nature. For example, electrons were found to give diffraction patterns when passed through a double slit in a similar way to light waves. Therefore, it was reasonable to assume that a wave equation could explain the behaviour of atomic particles.
Schrodinger was the first person to write down such a wave equation. Much discussion then centred on what the equation meant. The eigenvalues of the wave equation were shown to be equal to the energy levels of the quantum mechanical system, and the best test of the equation was when it was used to solve for the energy levels of the Hydrogen atom, and the energy levels were found to be in accord with Rydberg's Law.
It was initially much less obvious what the wavefunction of the equation was. After much debate, the wavefunction is now accepted to be a probability distribution. The Schrodinger equation is used to find the allowed energy levels of quantum mechanical systems (such as atoms, or transistors). The associated wavefunction gives the probability of finding the particle at a certain position.
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dont worry .
be happy and positive
nd nvr stop bcz life cant wait.
nd watever happens keep smiling bcz log haste huye btr lagte hain.try to fight wid d situation
nd tc of urself bcz u r spl to someone out dere |
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 25 Mar 2008 11:33:07 IST
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hiesenbergs principle tells us that the velocity as well as the position of an electron cannot b determined simultaneously,at one point u see an e at a position before u determine its v at that point its position and v wud have changed. to locate an e ,light was needed but light can change the v of the e. del(x) *del(v)=h/4 * m*pi e means electron hope this helps !!!!!!!!!!!!!!
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Varsha
be cool,
tomorrow is what we make it today,
so if u can dream it , u can make it .
life is an ice cream ,eat it before it melts away!!!!!!!!!
    

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![[Post New]](/templates/default/images/icon_minipost_new.gif) 25 Mar 2008 15:24:37 IST
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see heisenbergs principle states that it is impossible tp determine the position and momentum or velocity of a particle like electron simultaneously explanation>>> to determine the exact position of the electron you will have to use light of the wavelength of dimensions of electrons .... ...........like for measuring length of a thin wire you cannot use ur meter scale ..you need one of its dimensions,,, so if you use waves of such short dimensions to determine its position..ofcourse it has a lot of energy due to short wavelength.. ..this high energy by collision will be transferred to the electron increasing its momentum or collision ... and so we will not be able to determine ite velocity @@@hav a chillin time@@
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 25 Mar 2008 17:14:11 IST
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ACCORDING TO UNCERTAINITY PRINCIPLE,  x  p=h both position and momentum of a particle cannot be known accuratey at the same time. if position is known momentum will not be accurate and vice versa. when change in momentum is 0 then  x will be infinity to keep h constant that is its position will be around an infinite place or u can say it will not be known accurately.
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Remember Cedric. Remember, if the time should come when you have to make a choice between what is right and what is easy, remember what happened to a boy who was good, and kind, and brave, because he strayed across the path of Lord Voldemort. Remember Cedric Diggory.
Albus Dumbledore
Goblet of Fire, Chapter 37, Page 724
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 25 Mar 2008 17:32:40 IST
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simple.. for uncertainity principle, read this: http://en.wikipedia.org/wiki/Uncertainty_principle
for schroedinger's wave eqn, read this http://en.wikipedia.org/wiki/Schr%C3%B6dinger_equation
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JEE and OLYMPIA INFINATUM
http://iit-redefined.theforum.name/index.php
join the revolution!! |
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 26 Mar 2008 13:02:15 IST
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DO YOU WANT THE PROOF OF SCHRODINGER EQN THE ANSWER ME BACK
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WALK NOT AS IF YOU RULE THE WORLD...
BUT AS IF YOU DON'T CARE WHO RULES IT....
MAN WOULD DO NOTHING IF HE WAITED UNTIL HE COULD DO IT SO WELL THAT NO OTHER BEING CAN FIND FAULT WITH IT..................NEWMAN
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 29 Mar 2008 20:14:31 IST
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ok then give it here...bladx
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 29 Mar 2008 20:34:45 IST
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This is very useful!!
http://.online.redwoods.cc.ca.us/depts/science/chem/storage/Schrod/page2.htm
These two too
http://vergil.chemistry.gatech.edu/notes/quantrev/node8.html
http://vergil.chemistry.gatech.edu/notes/quantrev/node9.html
I can explain we |