Questions tagged [atomic-excitation]
21 questions
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How large can an atom get? What's the farthest an electron can be from its nucleus?
For example, would it be possible to excite a hydrogen atom so that it's the size of a tennis ball? I'm thinking the electron would break free at some point, or it just gets practically harder to keep the electron at higher states as it gets more…
zerozero
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Why does a gold leaf appear blue if made very thin?
Is this to do with excitation of electrons and emission of photons? Or is it more to do with the structure of the gold I.e. Only small wavelengths being able to pass through gaps between atoms?
EDIT: the reason for my question is that I am trying to…
Meep
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Can an excited atom have multiple electrons in excited states?
For an excited atom, is it possible for the atom to be excited twice, having multiple electrons in higher energy levels than for the atom in its ground state?
If it is indeed possible, what is the mechanism for this, can one photon excite more than…
3
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How do molecules bubble off a photon?
After being excited by a photon, an electron of a photoactive molecule jumps to a higher electronic state. When it relaxes, the molecule emits a photon (in simple terms). How is this photon "generated"? Photons are particle/waves, right? So somehow…
TMOTTM
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How sodium atoms in lamp are energized to produce light?
In a recent spectroscopy lab I performed for one of my classes we used a Lambda Scientific LLE-1/2 mercury/sodium lamp (to look at the sodium doublet) and a Lambda Scientific LLE-8 hydrogen/deuterium lamp (to look at the hydrogen/deuterium line). I…
NeutronStar
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How can we tell if a molecule is in thermodynamic equilibrium from scattering data?
We have a molecule that is emitting/absorbing photons. We know the Hamiltonian and that there are several levels. We count the emitted photons at different angles and frequencies. We can also do scattering with a beam of photons. From the absorption…
sebastianspiegel
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Maintaining local thermodynamic equilibrium (LTE) in radiating gas with a broad atomic transition line
Definitions / Background
In LTE, Kirchoff's law for radiation holds:
$$ \frac{j_{\nu}}{\alpha_{\nu}} = B_{\nu} (T) $$
where $j_{\nu}$ is the specific radiative emissivity, $\alpha_{\nu}$ is the monochromatic radiative absorption, and $B_{\nu} (T)$…
kleingordon
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Excitation energy of carotene using the particle in a box model
I'm practicing for an exam and I came across the following question:
The linear, conjugated π-electron system of a carotene molecule comprises 11 atoms and the distance between two atoms is 1.4 Å. Calculate the excitation energy and the wavelength…
user1870238
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How does electron excitation work for the Bohr model with non hydrogen atoms?
I've seen a lot of explanations of electron excitation by photons in the Bohr model but they all use a hydrogen atom which only has one electron.
How does the excitation work for atoms with more electrons and thus more energy levels?
It should…
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How does An Electric Field Create a Dipole Moment of a Rydberg Atom?
I know that an Rydberg Atom will not usually have a Dipole Moment - as the positive nucleus are surrounded by a negative electron cloud, so there is no uneven charge distribution.
However, I also know that a Rydberg Atom with experience an Electric…
zordman
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How does exciting an electron's surrounding electromagnetic field cause 'electron excitation'?
In more meaningful words than the ones above, how does adding energy to the EM field cause the electron to to change orbitals or oscillate in a different pattern.
user28141
- 279
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Spatial Resolution in Magnetocardiography
In the science paper called Development of an optical cardio-magnetometer by George Bison, it is mentioned that spatial resolution of 10-20mm is required for mapping MCG signal(page 52). What does the spatial resolution means here and does it…
NidhiS
- 51
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Where can I find a list of approximate excitation energies?
I would like to know the excitation energies for the known states of various nuclides. Is there a list somewhere that has this documented? I can't seem to find them easily for many nuclides. Maybe I have something mixed up in my head.
Also, is there…
Arturo don Juan
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Photon absorption by a hydrogen atom :
How does the photon absorption takes place in a hydrogen?
The classical mechanics shows the absorption of photonic energy resulting in the excitation of atom. Intuitively, a photon with frequency higher than that required for excitation of electron…
ryanafrish7
- 355
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Can all energetic photon excite an electron?
Consider a hydrogen atom, to excite the electron to a higher orbit, it should interact with photons of energy equal to that of the energy difference between the two states.
If the energy of photon is lesser, the electron rises up to an unstable…
ryanafrish7
- 355