Transition Definition and 496 Threads

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?

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...

Has anyone here done any study with automata? i'm interested in deriving a general model, in a state + transition encoded way; that's a parsing grammnar approach to start with, then generalize it further to a sort of wavevector/wavefunction algebra; a QM model since I study QI at the mo. IS...

1. Is a 4p -> 4s transition allowed in sodium? If so, what is the wavelength? If not, why not? (Z = 11 for sodium) 2. \Deltal = |l2 - l1| = 1 That is for the first question, in which case it is allowed, hence |0-1| = |-1| = 1, and meets the requirements for the equation. The second...

I am a rising sophomore and am currently registered for Physics I (calc) and Calculus II. However, I am attempting a double major (phys, math), and have started late...so I would like to double up on my maths for the next 2-3 semesters. I am currently learning Calculus II, so when I take the...

Hello, I usually just read the threads and watch the lectures on the forums so I haven't really had a reason to sign up until now. Given an academic guidance sub-forum I figured I'd give my question a try. Did anyone of you find high school boring, but come into your own during college? When...

i do not really understand wigmer-mermin theorem in my impression, it states that there is no continuous symmetry breaking in 1d and 2d so does wigner-mermin theorem rules out SF-Mott insulator transtion in 1d and 2d lattices ?

E of nlow to nhigh= -2.178*10^-18 * Z^2/nhigh^2 - nlow^2 find the energy needed to remove an electron completely from a hydrogen atom and the energy needed to remove one mol of electrons from one mol of hydrogen atoms Z= 1 nhigh= infinity nlow=1 E = 2.178*10^-18 J one mole of electrons...

We had a post-doctoral candidate interviewing this week who did his dissertation on OTR generated by relativistic electrons crossing a solid/vacuum interface. Unfortunately for him, he clearly didn't understand transition radiation, but it piqued the interest of the rest of us who interviewed...

Ok, I finished my physics I calculus based class, and really I don't feel like I learned a lot or mastered the material. I would spend many minutes nearing hours trying to think over my homework but with a load of other classes and the fact that we got all the hard and I do mean hard problems...

OK. I'm scared... this is the book I just got that one of my classes is using, and, reading the reviews on amazon ... well, you be the judge. I've never seen so many 1 star reviews for a textbook: https://www.amazon.com/dp/0534399002/?tag=pfamazon01-20 Has anyone used it? (this is the...

can anybody tell me why in general phase transition is not possible in one dimension? and for a lattice gas at low temp. why it requires long range order to occur phase transition?

Homework Statement p1 goes to p2 p2 goes to p3 p3 goes to p1 p4 goes to p3 Assume that surfers have an 80% chance of following one of the links on the page, and a 20% chance of jumping to a random page. (a) Write the transition matrix A representing the surfing process. (b) Is A...

FEM -- mesh generator, transition elements Hello, I would like to implement 2D mesh generator. Mesh should consists of triangle and rectangle elements and those triangle elements will play a role of transition elements. The example of such mesh is here: http://pkow.pl/transition_element.jpg...

Homework Statement First year-linear algebra (Proof based... and this is my first exposure to proofs so I'm like... lol). This question is pretty computational though. Find J, The Jordan Canonical form of a Given Matrix A, and an invertible Matrix Q such that J = Q(A)(Q^-1) Homework...

Homework Statement Find the transition matrix from B to C and find [x]C B = {(3,1), (-1,-2)} C = {(1,-3),(5,0)} [x]B = [-1 -2]T Homework Equations The Attempt at a Solution No clue :(

Hi! I really need some help I'm really really not good at physics...so Here it is 1) The electron energy of a hydrogen atom is given by -C/n^2 relative to zero energy at infinite separation between the electron and the proton (n is the principle quantum number, and C is a constant). For...

The harmonic oscillator is a model for the vibrating diatomic molecule. The energy expression for this model is given by: Ev = (v+1/2) hν v = 0, 1, 2, 3,… (ν = oscillator frequency) Use this expression to predict the wavenumber (cm-1) position of the infrared absorption due to the...

Homework Statement I need help with this problem please. My partner and I have stared at this problem and keep going in circles and can't seem to figure out how to work this problem. Please help! One mole of an ideal diatomic gas undergoes a transition from a to c along the diagonal path in...

Homework Statement A line of wavelength \lambda = 1091nm is observed in the hydrogen spectrum. Identify the transition that leads to this line. Homework Equations I don't know what this is asking... The Attempt at a Solution

we know that at temperature above 0K, in semiconductor some electron collecting sufficient energy fron surroundings to cross the band gap, placed in the conduction band. But what's the actual procedure to make the transition. I mean to say is it direct absorption of IR photons or by some other...

In case of indirect transition in an indirect semiconductor material, momentum as well as energy changes. I got from the book "solid state electronics devices" by Streetmen & Banerjee that in such kind of transition "the energy is generally given up as heat to latice rather than as an emitted...

Hi, I'm looking to find a function y=f(x), invertible to x=f(y) and written in terms of elementary functions and operations, that can represent a straight line Ax+B where x<<T and another straight line Cx+D where x>>T, where T is the x position where the two lines would cross. In the region...

Homework Statement Show that if n = m^3 - m for some integer m, then n is a multiple of 6.Homework Equations The relevant information is we don't know modular arithmetic yet, and the only methods of proof we have available are direct proof, contradiction, and counterexample.The Attempt at a...

Hi! I read in Zinn-Justin, that first order phase transitions always have a finite correlation length. Since correlation length is the inverse of the smallest physical mass within a model, this would mean that there can be no Goldstone bosons for a 1st order phase transition. How can that be...

Is there is a reason why the elements in that 'family' tend to be more satisfied with having their higher s orbitals half filled before their d orbitals and another thing, why is it that from Sc to Zn its size remains static (that is strange considering its Z eff is increasing)? There's also...

I am new at this and apologize if this is an inappropriate question per the rules. I hope it is not but I imagine it might be. In all cases, maybe this goes without saying, but in all cases I am looking not only for the answer to my question but also the basis of the answer. I am interested...

Hi, I am looking for some opinions on making the transition from computations to proof-writing. Next year, I plan on taking Honors Calculus at the University of Chicago and rather than learning axioms or any new mathematical concepts, I'd like to learn how to express mathematical ideas better...

Hi, Sorry to be a pain but I can't find what I'm looking for on the internet and our lab is locked. I need to know the accepted transtition temperature for Yttrium Barium Copper Oxide (YBa[SIZE="2"]2Cu[SIZE="2"]3O[SIZE="2"](7-x) Is anyone able to give me a figure or ideally point me in...

Im trying to figure out how to do this question. This is an example in the book i have. I am not sure how they got the answer. Here is the example from the book: Find the Transition Matrix P from the basis B={t+1, 2t, t-1} to B'={4t^{2}-6t, 2t^{2}-2, 4t} for the space R[t]. A little...

Hello! My textbook quotes the probability W of a transition between the levels 1 and 2 of a laser that appears in the rate equations. For E_2 = E_1 +h\nu it is supposed to be given by: W = \frac{1}{\tau VD(\nu)\Delta\nu} where \tau is the lifetime of the level 2 (probably for...

1. Problem Evaluate \int_{-\infty}^{\infty} \int_{-\infty}^{\infty} \int_{-\infty}^{\infty} z^{2} e^{-A \sqrt{x^{2}+y^{2}+z^{2}}} dxdydz 2. Useful Formulae none 3. Attempt at Solution Well, this is part of a much larger problem. I am trying to compute the dipole moment matrix elements...

I have a question that my teacher can't answer. :( I get that with the electronic configurations for atoms, an s shell fills before a d shell but also empties before a d shell. Okay. So the last couple of subshells for iron are 4s2 3d6; Fe2+ would be 4s0 3d6 and Fe3+ would be 4s0 3d5...

U(x,y)=Asin(pi*x/Lx) + Bcos(pi*y/Ly) where A,B,Lx,Ly are positive 1 Locate all the stationary points (i.e. minima, maxima and transition states (TS)) for this potential. a. What is the periodicity of U(x,y) along the two directions? b. Derive the TS barriers that an atom diffusing on...

Greetings, I have a PhD in Biomedical Physics, research in radiation biology and now a faculty position in cell and molecular biology. I want to return to medical physics but I lack the clinical courses needed, what is the best route to get this experience? Thanks.

A dynamic interurban of people shows the following Markov Transition Matrix of residents to urban, suburban and rural areas: __________Urban___Suburban____Rural Urban ... a...b...y suburban... o.....q.....z Rural ... 1-a-o ...1-b-q ... 1-y-z A = 0.9 O = 0.05 B = 0.1 Q = 0.7 Y = 0.1...

Pressure induced transition of graphite to diamond -- homework help Homework Statement Process is being carried out at 25*C and requires an increase in pressure until he graphite and diamond are in equilibrium. The following data is given at 25*C dG(25*C, 1atm) = gdiamond - ggraphite =...

Homework Statement My calculations indicate that the 2->1 transition in deuterium is lower energy than the 2->1 transition in hydrogen. I think I am making a mistake, does anyone know whether that is true? Is there a reference I can check? Homework Equations The Attempt at a Solution

Homework Statement (the actual question is now as an attachment) Assuming that the perturbation V(x,t)=\betax exp(-\gamma t) is applied at t = 0 to a harmonic oscillator (HO) in the ground state, calculate to the first approximation the transition probabilty to any excited state n\geq1...