Levels Definition and 499 Threads

Homework Statement Is the probability that an electron transitions from the N to M (n = 4 to n = 3) shell different than the electron going from L to K (n = 2 to n = 1)? So basically, should I expect to see a lot more transitions from n = 2 to n = 1, than any other type of transition? If...

I'm working my way through The Art of Writing Reasonable Organic Reaction Mechanisms by Robert B. Grossman (excellent book, by the way), but the way he describes resonance is confusing me. I feel like the more I think about it, the more confusing it gets. Consider a carbon-carbon double...

Im doing a study on a polyatomic molecule which is assigned by six quantum numbers, namely the three vibrational modes, and the Rotational quantum number J, and its projections on the A and C axes, (Ka and Kc): J, Ka, Kc, v1, v2, v3 Each combination of these numbers has an energy in...

Homework Statement hi this is a problem that puzzles me. it goes like this: energy/10–18 J ionisation level 0.0 level D level C level B ground state A –1.9 –2.1 –2.4 – 4.6 An electron with kinetic energy 2.6 × 10–18 J collides inelastically with an electron in the ground state...

Homework Statement The carbon-dioxide has nondegenerate vibrational energies εr=（h/2π）ω(r+1);r=0,1,2..., where ω=(1.26*10^14)s^-1. What is the contribution of these vibrational modes to the molar heat capacity of carbon-dioxide gas at T=400K? Homework Equations...

where can I get information about the excitation levels (gamma ray spectrum) of a single proton nucleus?

Homework Statement This is part of a much larger problem, but I'm stuck on trying to draw an energy band diagram for doped silicon and I'm wondering if it is possible for me to find the energy levels ( E_c, E_v, E_f, and E_i ) in a doped semiconductor knowing only the concentrations? This...

I am writing an essay about what would happen if Planck's constant changed to a much larger number. What I am having a hard time with is the discretization of energy levels for bound system... how would that change if Plancks constant was larger? Thanks for all the help in advance.

So, according to the Fermi function, the higher the temperature of a semiconductor, the higher the likelihood that the electrons can jump to the conduction band. But in superconductors, obviously the temperature is extremely low, so how does the Fermi level, band gap theory, and...

The US keeps printing extra dollars, but what are the actions being taken to reduce the nation's debts? Alan Greenspan warns that the ballooning debt levels could lead to another crisis at the bond market. Together with the simmering race to weaken national currencies makes me very worried about...

If you solve Schrodinger's equation for a particle in a box you find the solutions to be sines and cosines. The boundary condition that the wave function must go to zero at the edges of the box then leads to the need for an integral number of wavelengths and in turn quantization of energy. I...

This works on so many levels here, I couldn't resist. https://www.youtube.com/watch?v=4va2s6w4nFE

Hi every body and how do you do first sorry of my weak language because I'm new physical Researcher at KACST & I'm learn English now before go to master degree so my physical question is about the number of electrons in the first level of energy levels we know the the first level can't...

Hi everyone, So I'm doing some research on fluorescence and I'm puzzled. I understand that running a current through fluorescent gasses like neon cause the valence electrons to jump up an energy level, and I understand that photons are emitted when they fall back down into their default...

Using the inverse square law could anyone tell me what the outcome of this problem is? If the radiation level is 400mGy/hr at 2m from the point radiation source, what will be the radiation level at 6m? I figured it would be 1600mGy/hr at the point, and therefore 44.4mGy/hr at 6m being...

I need help with a mini communication project. I am trying to receive signals from RJ45 Ethernet (10 BASE-T), which comes in three logic levels (-2.5, 0, +2.5) and convert it into two logic levels so I can drive a laser on and off. Would anyone know of any IC's that can accept these signals to...

I'm quite concerned about that...

I found the interaction energy U of an electron in an atom with orbital quantum number l=0 with a uniform 2.00-T magnetic field to be 1.159E-4 eV, now it asks what is the energy difference between the two split states? We have short 3-point quizzes each day before lecture just to make sure...

In "A Prime Case of Chaos" (http://www.ams.org/samplings/math-history/prime-chaos.pdf), the author states that "Physicists ... believe the zeroes of the zeta function can be interpreted as energy levels..." I have two problems with this: (1) the non-trivial zeroes of the zeta function are...

[PLAIN]http://img814.imageshack.us/img814/3943/fluidmechanics.jpg Please let me know is my assumption correct? P1 = P2 = P4 = P5 = Atmospheric pressure P2 not equal to P3, and P3 is not under the atmospheric pressure. P2 not equal to P3 even are the same fluid, is because of the...

In "A Prime Case of Chaos" (http://www.ams.org/samplings/math-history/prime-chaos.pdf), the author states that "Physicists ... believe the zeroes of the zeta function can be interpreted as energy levels..." I have two problems with this: (1) the non-trivial zeroes of the zeta function are...

Hi... I'm having a little trouble understanding this concept. An energy level is a level where fx. electrons can be in. Ground state, 1st excited state etc., right ? So if I'm not mistaken, a degenerate state is when two or more different quantum states (Fx. electrons) are in the same...

I'd like to just preface this by saying I'm a non-science major in a science course. The professor mentioned we might need another textbook besides the ones for this particular class. Unlike all of the science/engi majors in the class, I don't have it. Homework Statement Using the...

Hi, I was just wondering if the vibrational energy levels in molecules decay, emitting a photon? or by some other mechanism? For example, if a laser is used to excite a vibrational mode (Like that in Stokes-Raman Scattering) from say v = 0 to v = 1 state. Will the molecule remain in the v...

hi, the following question is extremely important so please reply! in an atom, the energy levels of the electrons are negative and the velocity of the electron increases when the energy decreases. however, this cannot be the total energy(in relativity) because it does not includes the...

On Swimming Pool Levels... Alright, this should be a simple enough question. Per code, the pipe which feeds my swimming pools self-leveling pump has a valve to prevent back flow, so swimming pool water does not contaminate the residential main. However, the valve is located at a point...

...Earth stopped rotating? Most of North America would be swamped under poleward rushing oceans. A whimsical but cool look at an Earth stopped in its tracks... From http://bigthink.com/ideas/21768".

Homework Statement Greetings everyone I have been been asked to write a 10 page essay on Quantum Energy levels in atomic, molecular, nuclear and solid state physics. My problem is that this is such a huge topic and my knowledge of quantum energy levels and solid state physics is limited...

Homework Statement a) Calculate the Fermi energy for copper. b) Calculate the ratio of the number of occupied levels at an energy of 8.5 eV to the number occupied levels at the Fermi energy at room temperature. c) Based on your answer to a) and b) above, show that at room temperature...

I read that each line on a line spectra for an element represents an energy level. Hydrogen only has 1 electron which is in the first energy level so why are there so many lines on the H line spectrum?

what i mean is could it be possible for an alpha particle to acquire energy (by collision or from emission) and subsequently emit a gamma ray?? or does only have one (ground) state??

Homework Statement Calculate the first three energy leveles for an electron in a quantum well of width 10Angstrom and infinite walls. Homework Equations En=\frac{n2pi2(hbar)2}{2mL2} The Attempt at a Solution m=9.109E-31Kg L=10E-10m hbar=1.055E-34 En=n2*6.032E-20 My problem...

i'm new here and I'm not sure if this has been asked before, but I'm just wondering about the cause of its existence. I'm speculating that it may be caused by interaction between a proton and electron together with their masses, if so, how?

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 I have having difficulty explaining the splitting of helium atom energy levels for three different cases: 1)Coulomb interaction is ignored 2)Coulomb interaction is present but exchange interaction is neglected 3)Coulomb and exchange interactions are present The Attempt...

okay this isn't exactly me asking how to solve a question but just to verify the theory in my head. i need to calculate the 4 lowest energy levels for a 3d box (that has sides (2a,a,a)) and show all the quantum numbers (i imagine it means the x,y,z components of n, l, ml) and give the...

Homework Statement A group of psychologists once measured 77 variables on a sample of schizophrenic people and a sample of people who were not schizophrenic. They compared the two samples using 77 separate significance tests. Two of these tests were significant at the 5% level. Suppose...

In GR, the strength of gravity goes to infinity at singularities. But what if in nature, gravity increases up to a certain cut-off, and does not continue to increase. If the cut-off is sufficiently low, could it be gravity is not strong enough to overcome pauli exclusion principle, and...

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 Consider a neutral carbon atom that has six electrons orbiting the nucleus. Suppose that five of the electrons are in their lowest states,but the sixth is in a very high state. Why might the energy levels for the outermost electron be similar to those for the single...

I am wondering if testosterone levels in humans are linked to advantages in fighting. I know they are linked to masculinity, and we all know that the more masculine a man is, the more likely he will be able to defeat a less masculine male in a fight. Do testosterone levels have a link to how...

Homework Statement In the presence of a magnetic field, the energy of an atomic energy level is changed by the quantity: Emag=g\muBBM (i) Expain the meaning of the terms in the expression. (ii) Into how many levels is the ground state of the sodium atom split? (iii) For each...

Bhor's rule breaking "energy levels" when Ernest Rutherford's model of planetary system to explain the atomic structure, he was forced to have the regret by the fact that "accelerated charges dissipate their Kinetic energy into EM radiations." Bhor tried to avoid it.So he engaged the idea of...

Homework Statement I am somewhat confused about calculating the energy difference between different energy levels with the same principal quantum number (n). Eg. one of the questions that I have requires me to work out the energy difference between 23P2 state and the 23S1 state.Homework...

I was instructed by my parents not to eat anything during the solar eclipse that occurred yesterday. Though this is rubbished as a superstition, i also hear reasons that goes like, "The UV radiation received by Earth is higher during the eclipse period triggering the growth of some microbes and...

What is the difference between levels of protein structure ( Primary , Secondary , Motifis , Tertiary , Domain and Quaternary )

Are there (available) energy levels of an electron say, at a distance 1m, or 100m or 1km away, and near the moon and beyond that belongs to an atomic nucleus on Earth ? If yes, then why does it prefer to be within the 10^-10 meter distance from the nucleus ? Sridhar

I am having an issue calculating the first few energy levels of Lithium. To add, electron-electron repulsions are ignored. Since electron-electron repulsion is being ignored, I am starting with the following, For Hydrogen...

H2 has a moment of inertia equal to 4.603 x 10-48 kg m2. 1) Calculate its bond length. 2) For the first 3 rotational energy levels, find the a) l quantum number b) ml quantum number c) the degeneracy of each rotational level d) energy eigenvalues e) the magnitude of l Ok so I...

1a. Determine the Sound Pressure level at a point due to a machine running alone if the measurements at the point with the machine 'on' and 'off' are 94 dB and 90 dB re 20 uPa respectivele b) Consider white noise where P(f) = A for f >= 0. Show that the SPL's corresponding to successive 1/N...