Transition Definition and 544 Threads

I need some help how can I calculate a transition probability on this problem: A particle of mass "m" on a potential well (1), where it V(x) is infinite for x>L/2 and for x<L/2 . Inside the region V(x)=0 . I know how I get the eigenfunctions and the Energy. But, than the potential (2) well...

Hi! I saw this words "transition frequency" in the 2N2222A transistor data sheet.f=100MHz. What's this actually? I want to use this transistor 2N2222A to act as a switching application for turning on the motor by using microcontroller. So what should I consider when using this transistor...

Homework Statement Hi all, I've the following problem: I've a series of correlations matrices, suppose 15x15 matrix of correlations between waves heights. Giving an historical series of correlation values, how can I determine a model to establish that the next correlation matrix has a...

this problem is killing me! [calculation of electron transition] i've been trying to solve this problem.. the answer should be 7.. my answer is 0.7 ! What is the value of n_i for an electron that emits a photon of wavelength 93.14 nm when it returns to the ground state in the H atom? my...

If a Markov transition matrix's columns add up to 1, the matrix is a normal Markov transition matrix. Since it is normal, the Markov process must converge to a steady-state vector. Is this correct?

Ok, I'm lost. I've an exam coming up so could so with a speedy reply. This whole transition matrix stuff is not explained at all in our lecture notes. Here's an example question: "Suppose that a country has a fixed number of voters, all of whom vote for either party D or party R. Every...

I am looking at some of the notes but don't quite understand this. What are the physical explanation of the graphs (Fig 4(a) and 4(b)) on Page 4 ? http://www.pma.caltech.edu/~mcc/Ph127/b/Lecture3.pdf" Why V_{g} decreases with temperature but V_{l} increases with temperature?

Homework Statement How many transitions involving the hydrogen energy levels shown correspond to photons of infrared light? The infrared range is less than 1.8 eV Homework Equations Paschen Lines = Infared wavelengths The Attempt at a Solution I thought that since Paschen lines =...

Homework Statement Give the physical explanation of the graphs (Fig 4(a) and 4(b)) on Page 4 http://www.pma.caltech.edu/~mcc/Ph127/b/Lecture3.pdf" Homework Equations 1) Why V_{g} decreases with temperature but V_{l} increases with temperature 2) Why must phase transition happen at...

Homework Statement Explain why 2-bromopropane reacts with NaI in acetone over 10^4 times faster than bromocyclopropane. (Hint: examine the transition state for each of the reactions) Homework Equations The Attempt at a Solution I understand this is a sn2 type reaction and...

Consider a particle in an infinite square well described initially by a wave that is superposition of the ground state and the first excited states of the well: Ψ(x,t = 0) = C[ψ1(x) +ψ 2 (x)] (a) show that the value C =1/ 2 normalizes this wave, assuming 1 ψ and 2 ψ are themselves normalized...

Making the "Transition" Hello. I am currently a freshman in college, finishing up my second semester. I am looking at basically majoring in mathematics. (My actual major title will be Applied Mathematics and Computational Science, I am creating a major plan to better suit my needs.) Regardless...

I want to calculate the free-free transitions using the close-coupling method, and it is said that M. J. seaton etc. have already developed a good procedure (module STGFF) to calculate the free-free transition(Free-free transitions and spectral-line broadening, M. J. seaton 2000,Journal of...

I am going to start my MS in physics next year as I finish my BS, because I am enrolled in my schools BS/MS program. I was wondering about getting into Phd programs after finishing my masters. Would I be pretty much relegated to staying at the school I already received my masters at? Would top...

Hi Anyone, This is my first post here and i have a bit of a quandry. I'm doing some work related to hyperfine transition levels in Rubidium. Ive been looking and asking but no-one can explain to me satisfactorly how hyperfine splits occur. Mostly i get answers like " you should find out...

Homework Statement Positronium is an atom formed by an electron and a positron. It is similar to the hydrogen atom, with the positron replacing the proton. If a positronium atom makes a transition from the state n = 3 to a state with n = 1, the energy of the photon emitted in this...

Greetings Physics Forums! This is my first post. A physical phenomena that I know for a long time is that when an atom (let's say hydrogen) has an electron that make a quantum jump from a higher energy state to a lower it emits a photon. Suppose the hydrogen atom is isolated from the external...

Hey have another problem with one of my exercises Homework Statement Make a crude estimate for the mean life of an electric dipole transition in a atom E_\gamma = 10 eV in a nucleus E_\gamma = 1 MeV Homework Equations W_{\alpha \beta} &=& \frac{4}{3} \frac{e^2}{\hbar^4 c^3}...

I came across this problem in one of my linear algebra books. A linear transformation T:R^3 ->R^3 has matrix 2 3 0 -1 1 2 2 0 1 with respect to the standard basis for R^3. Find the matrix of T with respect to the basis B={(1,2,1),(0,1,-1),(2,3,2)} The answer given is...

Hi, I keep confusing myself between decoherence and the transition from pure to mixed, both of which, as far as I know, come about due to the interaction of a system with the environment. I like to think about things in terms of the density matrix to get it solid in my head. Can someone...

oiler formula says cosx+isinx but here they multiply by minus the imaginary part of the phasor representation the coefficient of sine is minus the imaginary part why??

from where the I gets the 5 electrons oxygen and hidrogen stay the same?

I have a question regarding the possible oxidation states of metals. I understand how to find the oxidation state of a metal in a compound, that's pretty straightforward. What I'm interested in is finding possible oxidation states given only the name of the metal. For example, Cu has possible...

http://i50.tinypic.com/2a6w9qg.jpg cant see how they put the only the denominator to be equal the new expression. ?

I am very early into my first look at topology (specifically, I am jumping to topology on smooth manifolds through the Baez/Muniain book - Gauge Fields, Knots and Gravity) and I have a few questions. Suppose we have overlapping sets on a manifold A and B like this...

Homework Statement A hydrogen atom is in state (|210>+|211>)/sqrt(2) relative to some fixed coordinate system. Assume only E1 transitions contribute. To which direction in space the rate of emission will be minimal? Homework Equations The rate of emission is proportional to |<F|X|I>...

Hello there, yet another trivial problem: I've attended the 'stochastic process' course some time ago but the only thing I remember is that this kind of problem is really easy to compute, there is some simple pattern for this I presume. thanks for your help, rahl.

Hey PF, So I am a junior in high school and am highly interested in physics and mathematics. I really want to go to college for something in this general area. I am really conflicted between taking courses concurrently at a community college, or taking them at my high school. More...

http://i47.tinypic.com/2lj3uvl.jpg how did they erased the derivative of I object how did they change the variable?

Homework Statement Is the following transition allowed? [4,3,0,1/2] -> [4,2,1, -1/2] If so, find the energy involved and whether the photon is absorbed or emitted for the hydrogen atom. Homework Equations Selection rules for allowed transitions: \Deltan = anything \Deltal =\pm1...

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How do I find the total electron count in a transition metal complex? For example, something simple like W(CO)6 or even more complicated like RuH(Cl)(PPh3)3? (Note: I don't mean "d electron count" [which I know how to find], I mean "total electron count.")

Homework Statement Transition metal species are known that contain multiple metal-carbon bonds, for example, M=CH2. Describe how the π portion of the M=C bond would be formed using a pure d orbital on M and in what plane the protons on the CH2 group would lie. (A d orbital is employed because...

Suppose that a casino introduces a game in which a player bets $1 and can either win $2 or lose it, both with equal chances. The game ends when the player runs out of money, or when he wins $4. (a) Build a transition matrix for the game, and show that it is not a regular transition matrix...

I have to learn a section from my textbook and I can't seem to undertand what a regular transition matrix is. The definition given is: A transition matrix is regular if some integer power of it has all positive entries. Now an identity matrix isn't regular, but I am pretty sure all integer...

Homework Statement A hydrogen atom with its electron in the n = 6 energy level emits a photon of the infrared light. Calculate the change in energy of the atom and the wavelength of the photon. Using Rydberg's equation, the change in energy is 1.82 x 10^-19J But I do not understand why...

Hi, I have a (markov chain) transition matrix X which I understand. In particular each row of this matrix sums to 1. I have used this transition matrix to construct it's generator, Y. I.e. Y is the continuously compounded transition matrix, X = exp(Y) X*X = exp(2Y), etc both X and Y...

Pre-industrial era, co_2 has been considered as ~280 ppm. Current value is ~387 ppm. http://en.wikipedia.org/wiki/Greenhouse_gas. Some projections are for co_2 to rise to ~540-970 ppm by 2100 (90 yrs away). http://en.wikipedia.org/wiki/Global_warming. Upper range of 970 ppm would represent 2.5...

Smooth transition map (easy!?) Homework Statement Check the transition map http://img132.imageshack.us/img132/4341/18142532.png is smooth in the set for which their images intersect The Attempt at a Solution I have thought of two ways to show this. (1) Show that Φ is a composition...

I have only taken one very intro quantum mechanics class and the furthest we got was solving the Schrodinger equation for the Coulumb potential of the hydrogen atom. So we solved for the allowed energy levels and the wavefunction for the hydrogen atom. We also learned how using the...

please tell me that why is it that an excited electron don't absorbs an extra photon before coming to ground state.

I have a question in Srednicki's book regarding path integrals, but first I'll set it up so that no familiarity of the book is required to answer the question. The vacuum to vacuum transition amplitude for the photon field in the presence of a source is given by: <0|0>_J=\int \mathcal D A...

microwave can be used to engineering potentials for alkali atoms i find that in the literature, people only take the magnetic dipole transition into account why the electric dipole transition is neglected? is it forbidden?

So, let's say that you wanted to find the optical transition rate between subbands for electrons in a quantum well. To a good approximation, you can say that the wavefunctions are of the form \Psi = \psi(\vec r) u_c(\vec r) where u_c is the Bloch function and the lowercase psi is a...

http://i30.tinypic.com/2i2r9i.gif

For hydrogen emission spectra from n = 3 to n = 2: My question is: In the following transition which is (are) possible or impossible and why? 3s --> 2s, 3s --> 2p 3p --> 2s, 3p --> 2p, 3d --> 2s, 3d --> 2p,

I hope some of you know something about transition density functions. I'm wondering if there are some nice properties I can use... Suppose p is a transition density function, defined as follows: p(t,f,a|T,F,A) dF dA := Prob(F<f<F+dF, A<a<A+dA | F(t)=f, A(t)=a). My question: what...

proof attached as pdf in link provided

At page 190 of Bransden & Joachain (see the page from http://books.google.com/books?id=i5IPWXDQlcIC&printsec=frontcover&dq=B.+H.+Bransden,+Charles+Jean+Joachain&hl=da#PPA190,M1"), there are 2 expressions for the transition probability, (4.38) and it's absolute value squared in (4.39). Is it...

Metals of Transition series influence in proton RMN spectra First of all, Greetings to everyone My question is simple but a bit able to create confusion i can't explain myself right so I'm going to try... The question is how can the fact of a metal being of the transition serie os periodic...