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    Split from Spectroscopy Discussion Thread

    A laser in visible is used in Raman spectroscopy and the resultant spectrum is in IR and Microwave region(which means molecular vibrations and rotations are excited), what type of interaction is this that induces these levels? ( I cannot think more than..."To be Raman active molecules should...
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    Another Raman spectrum question!

    A laser in visible is used in Raman spectroscopy and the resultant spectrum is in IR and Microwave region(which means molecular vibrations and rotations are excited), what type of interaction is this that induces these levels? ( I cannot think more than..."To be Raman active molecules should...
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    P,Q and R branches!

    In rotational-vibrational spectroscopy P-branch corresponds to low level rotational transitions "delta J = -1" and R-branch to high rotations "delta J = +1". And I am confused about Q branch which corresponds to "delta J = 0" ; which means that no rotational change is there and it is allowed in...
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    Raman spectroscopy is Single molecule identification

    Raman spectroscopy is "Single molecule identification" Hi , I heard that the speciality of Raman spectroscopy is "Single molecule identification", it'd be really great if somebody can tell me HOW! because its surely going to be a question in my exam!! Thanks in advance.
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    Spectral energies!

    Rotational energies are in microwave region and vibrational are in infrered region, then how can the both be excited symultaneously? To excite vibrations we need infrared radiation then how can rotations be excited which are in microwave region?
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    Covalent diectional?

    covalent diectional?? Covalent bond is directional because it is due to the orbital overlap and orbitals can overlap only in certain directions to give constructive interference. (This is true I hope! comments pls!) . My question is when two s-orbitals (from two atoms) overlap how can it be...
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    Orbital properties and electron energies?

    hey where r my recent posts on orbital properties and electron energies?
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    Angular node

    angular node!! why the angular momentum of electron in the ground state is zero?? (an s-electron) And why it has angular momentum when there is a node?? And pls give some info on what is a Radial node and what is an angular node and their contributions to the energy of electrons??
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    Finding the electron increases if we go towards the nucleus?

    Is it true that the probability of finding the electron (s-electron) increases if we go towards the nucleus? then what accounts for its stability from not being attracted by the nucleus n collapsing into it..its a basic question but i dont have an idea now!! Is it just the concept of constant...
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    Strongest bond?

    which is the strongest of all the chemical bonds? metallic or covalent?
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    Electrons cannot follow the applied A.C field

    what does it really mean by saying that "electrons cannot follow the applied A.C field!" ?? (hence the wave vector is complex!)
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    Why is covalent bond a directional bond ?

    why is covalent bond a "directional bond"? why is covalent bond a "directional bond"?
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    Line width!

    If we look at any spectrum the lines are due to the corresponding transitions in sample. And the line widths are due to the uncertainity principle and doppler effect etc, if these effects are absent should these lines be just spikes?
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    Shot wave length corresponds to high curvature of the wave function

    What does it mean by "shot wave length corresponds to high curvature of the wave function" ?
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    Moecular spectroscopy

    Why is it not possible to obtain a pure vibrational spectrum(IR-spectrum) of a molecule? (vibrational spectrum always contains lines of rotational energies)
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    Drude model!

    In free electron theory, electron doesnt feel any potential due to ions r co-electronsm they r totally free..then why dont they fly off from the metal boundaries?
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    Shapes of potentials

    shapes of potentials!! Hi all.. 1)we have,for example,rectangular, square well, well type etc potentials. How is the shape of a potential is determined? What is the shape of the nucleus potential? 2)I am unable to get the physical importence of the wave vector 'K' and K-space in band...
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    Some basic x-ray questions!

    In x-ray diffraction with crystals, what actually happens with the incident x-ray beem or photon? scattering occurs due to which atoms (plane) of the crystal?(can it penetrate in to the interior of the crystal?) why doesnt the reflection occur with big wavelengths?
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    Exp'al set-up

    Hi, I went to my proff to ask for my master thesis, he told me that you yourself have to do the experimental set-up for EMISSION AND REFLECTION SPECTROSCOPY ,,,but I am not that experienxed, anybody knows is it an easy task or...???
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    Violation of law of conservation?

    violation of law of conservation??? When the light goes through a glass window, it undergoes refraction inside the glass material and its velocity is decreased (changed)for sure, then how come the light,after coming out of the glass, can travel with the standard velocity?? what is the source...
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    Gravity on atoms?

    I wish to know whether gravity has any effect on atoms? And if so to what extent ?
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    Raman spectroscopy

    raman spectroscopy!!! Hi, can anybody please tell what is the speciality of Raman spectroscopy and how it differs from other techniques?? does it have any uniqueness? more info is welcomed! thanks in advance.
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    Wht abt molecular arbital?

    ok thankyou malron,,,but what about molecular orbitals? the different shapes given for them are because of sharing of electrons where as the concept of finding a partical remains the same as in atomic arbital..i think i am correct,,.
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    Orbit n orbital

    orbit n orbital!! hi, what is the difference between Orbit and Orbital??? when electron is moving so fast, how can we assume of arranging them in an arbital? I am unable to get the actual concept!
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    Why rotational in vibrational?

    why rotational in vibrational?? Hello, I recently had an exam in Molecular physics, in which one of the unanswered questions asked by my proff was "How come there are rotational transition lines in a vibrational spectrum? because we observe vibrational spectrum in infrared level radiation and...
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