Anyone know where I can get a manual for:

Optomechanics Research model 10C Grating Spectrograph (Astronomical)

A photocopy or computer scan of it would be fine.

Thanks:  Ed

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Dear Colleagues,
On behalf of the HEN 2008 Organizing Committee, I would like to
invite you to the 7th International Conference " Human Ecology and
Nature" (HEN 2008), which will be held in Moscow and Ples, Russia,
June 27-July 2, 2008.
Therefore, I am sending you the respective Announcement & Call for
Papers.
I would also like you to consider the possibility of organizing an
invited section related to the topic of your research interest within
the main Conference Symposiums by collecting and reviewing the papers.
Please send the proposed section title to the Organizing Committee
and start collecting the papers, which after your approval will form
the Section.

If you need a detailed Call for Papers, don't hesitate to ask the
Organizing Committee.

Could you deliver the Call for Papers to those who may be interested.

Sincerely,
Prof. Vladimir V. Zaitsev
HEN 2008 Chairman


Announcement
& Call for Papers

STATE UNITARY FIRM – MOSCOW SCIENTIFIC
AND INDUSTRIAL ASSOCIATION "RADON"
Organize the 7th International Conference
"HUMAN ECOLOGY AND NATURE" , Moscow-Ples, Russia, June 27-July 2,
2008.


In 1998, the 1st International Scientific Conference "Human ecology
and nature" has been organized jointly by the Ivanovo State
University and the Ecological Committee of the Ivanovo region. By
the results of the Conference, the program and the conference
proceedings were published.
According to the accepted decision, in 1999 the All-Russian
Scientific Conference "Molecular physics of nonequilibrium systems"
supported by the Russian Foundation for Basic Research was held.
Above 200 participants took part in the All-Russian Conferences in
2000-2001, and more than 200 presentations were represented. 284 and
328 page volumes of the Conference proceedings were published to the
beginning of the work of the Conferences. Participation in the last
All-Russian conference of scientists from India, the USA and other
countries made it possible to take a decision about a transformation
of the Conference and giving to it an international status with the
considerable extension of conference objectives.
The decision of the Conference-2002 also extended scientific
objectives, in connection with the hottest topic of works on
radioactive waste handling. Beginning from 2000, the Symposium – the
International Conference "Human ecology and nature" was indispensable
part of the Conferences.
Organization committee welcomes the participation in the Conference
work not only experts, but also graduate, postgraduate and Dr.Sc.
students.

The purposes of the International Conference "Human ecology and
nature" are: exchange of scientific information; detection of key
scientific problems and paths of their solution; support in training
of experts, postgraduate and Dr.Sc. students.


INTERNATIONAL ORGANIZING COMMITTEE

- Sergey A. Dmitriev (Chairman) – Dr.Sc., Prof., Russia;
- Andrei I. Sobolev  – Dr.Sc., Prof., Russia;
- Rudolf M. Aleksakhin (Co-Chairman)– Dr.Sc., Prof.,
Academician of RAAS, Russia;
- Elena B. Burlakova (Co-Chairman)–   Dr.Sc., Prof.;
-  Bilqees Bano – Ph.D., Prof., Department of Biochemistry AMU,
India;
- Natalie V. Gzhibovskaya  – Dr.Sc., Prof., Latvia;
- Ludmila E. Pikalova – Ph.D., Prof., Russia;
- Aleksey K. Rebrov  – Dr.Sc., Prof., Academician of RAS,
Russia;
- Valeriy V. Lunin– Dr.Sc., Prof., Academician of RAS, Russia;
- Aleksandr M. Chekmarev – Dr.Sc., Prof., Corresponding Member
of RAS, Russia;
- Oleg G. Polsky – Ph.D., Russia;
- Pankaj Vadgama -  Ph.D., Prof. of London University, UK;
- Tide Hainz – Ph.D., Prof., Germany;
- Arkady D. Ursul -  Dr.Sc., Professor, Academician of AS of
Moldova.

    ORGANIZING COMMITTEE

- Vladimir V. Zaitsev (Chairman) - Dr.Sc., Prof.;
- Valery D. Akinshin(Co – Chairman) -  Dr.Sc., Prof.;
- Yuri I. Bobkov – Dr.Sc., Prof.;
- Igor A. Sobolev – Dr.Sc., Prof., Russia.;
- Aleksandr N. Kamnev – Dr.Sc., Prof.;
- Andrey L. Vinnik - Dr.Sc., Prof., Academician of RAMS;
- Sergey A. Seleznev – Dr.Sc., Prof.;
- Andrey I. Sobolev - Dr.Sc., Prof.;
- Sergey V. Stefanovsky  - Dr.Sc., Prof.;
- Nadezhda V. Usol'tseva - Dr.Sc., Prof.;
- Aleksandr V. Ochkin - Dr.Sc., Prof.;
- Vladimir N. Matveyenko – Dr.Sc., Prof.;
- Elena V. Fedina -  Dr.;
- Olga A. Rucheva - DR;
- Irina I. Pelevina -  Dr.Sc., Prof.;
- Nikolai N.Buravcytnko - Dr.Sc., Prof…
-

SCIENTIFIC PROGRAM: TOPICS

Symposium I   "General  ecology»
Chairpersons:
- Valery D. Akinshin,  Dr.Sc., Prof.;
-  Rudolf M. Aleksakhin - Dr.Sc., Prof., Academician of RAAS,
Russia;

Symposium II "Molecular chemistry, physics and biology of
heterogeneous systems in ecology"
Chairpersons:
- Valeriy V. Lunin, Dr.Sc., Prof., Academician of RAS, Russia;
-  Vladimir V. Zaitsev  Dr.Sc., Prof.

Symposium III  "Information problems of ecology"
Chairpersons:
-  Aleksey K. Rebrov, Dr.Sc., Prof., Academician of RAS, -  Russia;
-  Andrei I. Sobolev, Dr.Sc., Prof., Russia

           Symposium IV  "Radiobiology and Radioecology"
Chairpersons:
-    Aleksey K. Rebrov  – Dr.Sc., Prof., Academician of RAS, Russia
-    Elena B. Burlakova ,  Dr.Sc., Prof.;
-    Oleg G. Polsky, Dr.Sc.;
-    Irina  I. Pelevina, Dr.Sc., Prof ..


INSTRUCTIONS FOR PAPER SUBMISSION

1. Papers must contain the clear description of conception, aim,
scientific value and results of study. The size of the manuscript
should not exceed 5 printed pages.
2. Authors are requested to follow the manuscript style guidelines
presented below.
• The text and figures should fit on one side of A4 paper (210
mm υ 297 mm) with margins (left -25 mm, right - 15 mm,
top - 17 mm, and bottom - 20 mm) using MS Word. Use Times New Roman
12 point fonts, typed single-spaced.
• Beginning at the left margin, type as follows:
- THE NAMES OF THE AUTHORS WITH CAPITAL LETTERS,
- their institutional affiliation, address and E-mail,
- leave one blank line,
- THE TITLE WITH BOLD CAPITAL LETTERS, CENTRED, WITHOUT A
POINT AT THE END,
- leave one blank line before the text of the manuscript.
• If two and more authors are from the same institution, their
names should be typed in one line through comma. If authors work in
different ones, their names should be typed in different lines, and
their institutional affiliation and address should be printed under
the names in a new line (see an example).
• Figures and tables should be placed into the text after
paragraph contained reference on them. table The table title types
above the table. The figure legend types under the figure.
• All publications cited in the text should be presented in a
list of references following the text of the manuscript. In the text
refer to the reference number in square brackets according to the
reference list.
Papers not complying with these instructions will be rejected.
3. Authors are requested to submit their manuscript to the organizing
committee by post (two original copies with the authors signatures on
one of them) or by e-mail as an attached file in MS Word.
Paper style example:

ANDREW M. YAKOVLEV
Crystallography Institute of RAS, Moscow
HENRY S. MORGAN, ZEYNEB ZAAHAN
Casablanca State University, Casablanca, Marocco
E-mail: human-ecology@...

ELECTRICAL PROPERTIES OF ZnP2 SINGLE CRYSTALS OF TETRAGONAL AND
MONOCLINIC MODIFICATIONS

Measurements are made of the electrical properties of both
modifications of ZnP2 crystals, which are doped, undoped and annealed
vacuum and in vapor of the components. The measurements are carried
out in the temperature range from 190 to 380K. The donor centers7 are
found to be vacancies of phosphor. The dominating scattering
mechanism [1]............…………………………………………………...

References:
1. Clark N.A. // Mol. Cryst. Lig. 1983. V. 94. # 1. P. 130.











REGISTRATION AND PARTICIPATION

Participants are requested to submit their papers accompanied by the
presenting author registration data:

  STATE UNITARY FIRM – MOSCOW SCIENTIFIC
AND INDUSTRIAL ASSOCIATION "RADON"
organize
the 7th International Conference
"HUMAN ECOLOGY AND NATURE"



Moscow-Ples
Russia
June 27-July 2, 2008.


1. Full name,
2. Rank and title,
3. The both home and affiliation addresses, phones and
e-mail.
to the organizing committee via post or e-mail
not later then May 20, 2008.


Address of the organizing committee:

Vladimir V. Zaitsev, Dr.Sc., Prof.
2/14, 7th Rostovsky lane, Moscow 119121, Russia
Phone: + 7 (095) 4855879
Fax: + 7(095) 4855879
E-mail: mocconfere@....

Registration Fees: Payment by cash at registration

The registration fee is RUB 10000 (US $ 400) per participant. This
amount will cover welcome reception, conference dinner, refreshments
during breaks, social program and the book of the conference
proceedings.  The payment must be made in cash in connection with the
registration on the first day of the conference.

Accommodation:
Participants will be hosted in hotels with maximum price up to 150
USD per night.

Presentations:
Time of an oral presentation is 10-15 minutes. Presentation should
include: task; methods; main body (basic results) and conclusion.
Overhead projector will be available at the conference.

Official languages of the Conference are
Russian and English.

> Hello,
> I'm an amateur scientist in Denver, CO, looking to expand my lab a
> bit.  I would like to be able identify different compounds in a
> solution of (whatever), and have a computer identify the ingredients.
>
> I *assume* I need:
> 1) a spectrophotometer with a computer interface and software
> 2) a way to seperate the individual compounds using chromatography
> (HPLC?)
> 3) a database to identify the individual spectra
> 4) I'm not sure what the most useful spectra are - IR / Vis / UV?
> 5) Are there any free computerized databases out there?
>
> This is brand new territory for me.  What used system, which I might
> find on Ebay would be the best 'bang for the buck'?
>
> Thanks for your advice!
> Best regards,
> -Mark


I solve this problem using thin-layer chromatography combined with an old
grating IR instrument.

I can think of these advantages in this approach:

1) The chromatography is cheap and easy requiring very little equipment:

- Jars
- Solvents (certainly much less than HPLC)
- UV lamp
- Visualizing agents

2) You can find references for Rf values, developing systems, and
visualizing agents.
      (It certainly helps if you know what your looking for.)  TLC plates
show up on
      Ebay all the time.

3) It's possible to make TLC semi-quantitative using some sort of
densitometry
....for example a computer scanner and freeware software such as Scion
Image.
(In the process, you'll learn a bit of image analysis.)

It's also possible to pick up instruments designed for TLC scanning on Ebay.
e.g.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=26230&item=7503575157&rd=\
1&ssPageName=WDVW

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=26230&item=7503599058&rd=\
1

4) You can do preprative TLC or column chromatography to isolate compounds.
From these isolations, you can then collect other important characterization
data such
as melting points etc.

You can do centrifugal TLC for preprative work using an instrument such as
this:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=48720&item=7503488286&rd=\
1&ssPageName=WDVW

Be careful when buying any IR or UV spectrophotometer.  I would certainly
try and
accertain whether the source works in any IR or UV instrument or UV HPLC
detector as
the replacement of them can be very costly.....if you can find the lamp.

You can get single wavelength detectors for HPLC pretty cheap but again,
make sure the UV source works.

A simple HPLC pump and injector can certainly be put together.  If you run
in isocratic
mode you could recycle the mobile phase easily.  The chromatography will be
less versatile (powerful).

Software for matching UV/VIS spectra exists but there's some significant
limitation in what you can identify from a UV/VIS
spectrum.  Any molecule with a particular chromophore(s) is going to give
essentially the same UV/VIS spectrum.

Outside mass spec, I tend to think IR spectroscopy gives you the largest
information content concerning unknown
identification.  It's possible to build your own IR libraries and code the
software to do library searches, but it would be
a big project.  It's probably better just to use your head and 'interprete'
the IR spectra.  Of course getting a good
IR spectrum depends on your success in isolation of compounds via TLC etc.

What you're wishing for in terms of having an instrument identify all the
unknowns in a mixture is probably best met by a
GC/MS, but what are the chances of actually coming up with such an
instrument via Ebay cheaply? I think slim.

My advice is to consider TLC and a good dose of "old school" organic
chemistry thinking.  Do some research
into the techniques of the organic experiementalists before the advent of
modern computerized instrumentation.

Take to heart these words by Albert Hoffman:

"For structure determination, which today can be conducted rapidly and
elegantly with the help of spectroscopic
methods (UV, IR, NMR) and X-ray crystallography, we had to rely, in the
first fundamental ergot studies,
entirely on the old laborious methods of chemical degradation and
derivatization."

LSD, My Problem Child p.10

Hello,
I'm an amateur scientist in Denver, CO, looking to expand my lab a
bit.  I would like to be able identify different compounds in a
solution of (whatever), and have a computer identify the ingredients.

I *assume* I need:
1) a spectrophotometer with a computer interface and software
2) a way to seperate the individual compounds using chromatography
(HPLC?)
3) a database to identify the individual spectra
4) I'm not sure what the most useful spectra are - IR / Vis / UV?
5) Are there any free computerized databases out there?

This is brand new territory for me.  What used system, which I might
find on Ebay would be the best 'bang for the buck'?

Thanks for your advice!
Best regards,
-Mark

Hi,

Yes, it depends on wavelength.
Actually it is described for visible region. This is of your interest.

Regards,
Vandana

On Mon, 4 Apr 2005, talkme wrote:

> Hii Everybody
>
>                 can any one tell me if i use
> Microscope's  microobjctive (MO) to focus a laser
> beam,does it focus exactly according to its
> magnification number?
>
> i tell it different way,if i use He-Ne ~ 100 micron
> spot to focus with 50X MO,will it make the spot size 2
> micron in focal plane ?? is it wavelength
> dependent,like IR,VIS,UV..i am interested in VIS only.
>
> thanks in advance
>
> regards
> Dinesh
>
>
>
> #####################################################
>
> "This world is an illusion, things are there because we want to see them
> there."
>
> #####################################################
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
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>
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>
>

Hii Everybody

                 can any one tell me if i use
Microscope's  microobjctive (MO) to focus a laser
beam,does it focus exactly according to its
magnification number?

i tell it different way,if i use He-Ne ~ 100 micron
spot to focus with 50X MO,will it make the spot size 2
micron in focal plane ?? is it wavelength
dependent,like IR,VIS,UV..i am interested in VIS only.

thanks in advance

regards
  Dinesh



#####################################################

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Hi Varathu,

I didn't ask the process of denaturing. I wanted to know the procedure of
making deuterated ethanol (C2H5OD).

Regards,
Vandana

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Vandana Sharma
  Laboratory Astrophysics,
  LAB- 570
  Space and Planetary Atmosphere Division,
  Physical Research Laboratory,
  Navrangpura,
  Ahmedabad- 380 009
  Gujarat, India

  Phone No : (91)-079-26302129-Ext-4570/4567(lab)
             Mobile:09426533036
  Email    : vandanas@...
             van_res@...
  URL      : http://www.prl.ernet.in/~vandanas
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

On Mon, 14 Mar 2005, varathu rajan wrote:

> Hi,
>
>  I think a drop of metanol is enough to denature the etanol.
>
> urs
> Varatharajan.
>
> Vandana Sharma <vandanas@...> wrote:
>
>
> Hello all,
>
> Does any body know the method of making Deuterated Ethanol?
>
> Expecting reply.
>
> Vandana
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Vandana Sharma
> Laboratory Astrophysics,
> LAB- 570
> Space and Planetary Atmosphere Division,
> Physical Research Laboratory,
> Navrangpura,
> Ahmedabad- 380 009
> Gujarat, India
>
> Phone No : (91)-079-26302129-Ext-4570/4567(lab)
> Mobile:09426533036
> Email : vandanas@...
> van_res@...
> URL : http://www.prl.ernet.in/~vandanas
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
> ---------------------------------
> Do you Yahoo!?
>  Yahoo! Small Business - Try our new resources site!

In a message dated 3/14/05 7:46:14 AM Pacific Standard Time, vandanas@... writes:

Hello all,

Does any body know the method of making Deuterated Ethanol?

Expecting reply.

Vandana

Well, I would go make a deuterated ethene and then add dueterated water across the double bond.  The reactions for hydrogen are well known catalytic reactions.  Substitute D for H and write up the differences.  However, definitely proceed with caution with that because a couple of guys at my alma matre, SRI International, blew themselves and the whole room up playing with small quantities of Deuterium on catalysts.  The they said it was cold fusion, but the establishment says that is impossible.  Anyway they died and the room disappeared.
Bill Isakson
-----William E.J. Isakson,  El Cerrito, CA,  CatalyticChemist@...
http://members.aol.com/WeAlsoWalk             We Also Walk
American Chemical Society member
American Institute of Chemical Engineers member
American Radio Relay League member
Society for the History of Alchemy and Chemistry member

Hello all,

Does any body know the method of making Deuterated Ethanol?

Expecting reply.

Vandana

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Vandana Sharma
Laboratory Astrophysics,
LAB- 570
Space and Planetary Atmosphere Division,
Physical Research Laboratory,
Navrangpura,
Ahmedabad- 380 009
Gujarat, India

Phone No : (91)-079-26302129-Ext-4570/4567(lab)
Mobile:09426533036
Email : vandanas@...
van_res@...
URL : http://www.prl.ernet.in/~vandanas
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~






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Yahoo! Groups Links

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Hello all,

Does any body know the method of making Deuterated Ethanol?

Expecting reply.

Vandana

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Vandana Sharma
  Laboratory Astrophysics,
  LAB- 570
  Space and Planetary Atmosphere Division,
  Physical Research Laboratory,
  Navrangpura,
  Ahmedabad- 380 009
  Gujarat, India

  Phone No : (91)-079-26302129-Ext-4570/4567(lab)
             Mobile:09426533036
  Email    : vandanas@...
             van_res@...
  URL      : http://www.prl.ernet.in/~vandanas
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

http://www.ardice.com/Science/Chemistry/Analytical/Directories/
Hello, I found this group at this website.

Hi Matin,

If you have information about then could you please drop the site
address of all in this "spectroscopic group's" mail box.

Looking forward to see your reply.

Kind regards,
Vandana

Vandana Sharma                         
Laboratory Astrophysics,
LAB- 570
Space and Planetary Atmosphere Division,          
Physical Research Laboratory,     
Navrangpura,
Ahmedabad- 380 009  
Gujarat, India                   

Phone No : (91)-079-6302129-Ext-4570/4567(lab)     
Email    : vandanas@...
            van_res@...
URL      : http://www.prl.ernet.in/~vandanas

On Fri, 12 Nov 2004, Matin wrote:

>
> hello everybody.i have some informstion and addresses of some good
> site about group theory and it's application in specteroscopy.and
> about symmetic moleculs and character table.thanks
>
>
>
>
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>     spectroscopy-unsubscribe@yahoogroups.com
>     
>  *  Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
>
>

Hi Matin,

If you have information about then could you please drop the site
address of all in this "spectroscopic group's" mail box.

Looking forward to see your reply.

Kind regards,
Vandana

  Vandana Sharma
  Laboratory Astrophysics,
  LAB- 570
  Space and Planetary Atmosphere Division,
  Physical Research Laboratory,
  Navrangpura,
  Ahmedabad- 380 009
  Gujarat, India

  Phone No : (91)-079-6302129-Ext-4570/4567(lab)
  Email    : vandanas@...
             van_res@...
  URL      : http://www.prl.ernet.in/~vandanas

On Fri, 12 Nov 2004, Matin wrote:

>
> hello everybody.i have some informstion and addresses of some good
> site about group theory and it's application in specteroscopy.and
> about symmetic moleculs and character table.thanks
>
>
>
>
> Yahoo! Groups Sponsor
> ADVERTISEMENT
> click here
>
>
________________________________________________________________________________
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>  *  To visit your group on the web, go to:
>     http://groups.yahoo.com/group/spectroscopy/
>
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>     spectroscopy-unsubscribe@yahoogroups.com
>
>  *  Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
>
>

hello everybody.i have some informstion and addresses of some good
site about group theory and it's application in specteroscopy.and
about symmetic moleculs and character table.thanks

Hello everyone

My name is William Goosen.

I am a Masters student at the University of Port Elizabeth in South
Africa.I am currently studying Raman spectroscopy at our Physics
department, focusing specifically on solid state thin films.

Hey,
I am a research student at polytechnic university and I have
combined Polyacrylonitrile with CNT's, and have taken an infrared
spectra of my composite film. Would anyone be able to help interpret
the spectra recieved and possible reasons for variations once the
spectras are compared?

Thanks!

The Spectra was placed in the photos portion of the room

Thanks
Mike

Hi.
I am a master student in Turkey and my thesis is related to the
(e,2e) technique in obtaining information on both structure and
collision dynamics and the electron impact spectroscopy: from atom to
solids.

The possibility of investigating the electronic structure of solids
is largely based at present upon measurements of excitation energies
and transition probabilities. In spite of the large number of
spectroscopies currently used to characterize the electronic
structure of surfaces, none of them is capable of measuring momentum
distributions. Although it is very sensitive to fine details of the
wavefunction, the electron momentum density is not as widely
investigated as the other observables because ionization experiments
are needed to measure it, with completely determined kinematics.
Coincidence experiments of this kind, in particular (e,2e) and
coincidence Compton scattering experiments are the only available
spectroscopies capable of providing both binding energies and
momentum densities of the single particle states of the quantum
system under study.

The (e,2e) spectroscopy and the coincidence Compton scattering have
already shown their capability to investigate bulk properties of
solids. In particular, (e,2e) has already produced a fairly large
body of resuls on thin film momentum distributions. As far as
coincidence Compton experiments are concerned, it must be noted that
because of the smallnes of the cross section they are becoming
feasible and available for massive investigations only with the
advent of third-generation synchrotron sources. Their energy
resolution, however, is still not as goos as in the (e,2e)
experiments.

Best regards

Omer Sise
Department of Physics
Afyon Kocatepe University

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Dear Varathu,
Rahul is right. Only if the molecule is assymetric (heteronuclear) will
rotational spectrum be observed, since if it is homonuclear there will be
no dipole component change during the rotation and hence no interaction
with radiation. But you can't understand what the selection rules and
dipole terms are until unless you have completed your first year M.Sc.
So here the anwer goes in a classical manner (not in QM al)
The basic requirement for the emission or absorption of radiation by a
transition between rotational energy states is that the molecule must have
a permanent dipole moment. This is what the classical electrodynamics
says. Accor. to this a rotating molecule can lead to emission of radiation
only if a changing dipole moment is associated with it. Heteronuclear
diatomic molecules with unlike atoms, for which the centers of +ive and
-ive charges don't coincide, hence have a dipole moment. During the
rotation of the molecule the component of the dipole moment in a fixed
direction changes periodically with the frequency of rotation,v , of the
molecule so that, classically, the radiation of frequency v should be
emmited. Homonuclear molecules have no dipole moment and hence there is no
emmision of IR radiation.

I think this answers your question.


Best wishes,
Vandana


Vandana Sharma
  Laboratory Astrophysics,
  LAB- 570
  Space and Planetary Atmosphere Division,
  Physical Research Laboratory,
  Navrangpura,
  Ahmedabad- 380 009
  Gujarat, India

  Phone No : (91)-079-6302129-Ext-4570/4567(lab)
  Email    : vandanas@...
             van_res@...
  URL      : http://www.prl.ernet.in/~vandanas

On Sat, 3 Jul 2004, [iso-8859-1] varathu rajan wrote:

> Dear Madam,
>      My question is why a molecule should have permanent dipole moment to
absorb the Micro Wave radiation.
>     In other words why molecules such as Hydrogen does not give rotational
spectra?
> Similarly why symmetrical stretching of  CO2 is Infrred inactive?
>
> Friendly,
> Varathu.
>
> Vandana Sharma <vandanas@...> wrote:
> Dear Varathu,
>
> Could you please elaborate your question.
>
> Regards,
> Vandana
>
>
> Vandana Sharma
> Research Scholar
> Laboratory Astrophysics,
> LAB- 570
> Space and Planetary Atmosphere Division,
> Physical Research Laboratory,
> Navrangpura,
> Ahmedabad- 380 009
> Gujarat, India
>
> Phone No : (91)-079-6302129-Ext-4570/4567(lab)
> Email : vandanas@...
> van_res@...
> URL : http://www.prl.ernet.in/~vandanas
>
> On Thu, 24 Jun 2004, [iso-8859-1] varathu rajan wrote:
>
> > Dear Friends,
> >
> > I have a dobt in the fundamentals of spectrosopy.
> > My doubt is
> > 1.For a molecule to be MW active,why it should have permanent Dipole moment
&.
> > 2.To be IR active, why a molecule should undergo net change in its dipole
moment?
> >
> > Plz clear my doubts
> >
> > Friendly,
> > Varathu
> >
> >
> >
> > Yahoo! India Matrimony: Find your partner online.
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
> Yahoo! India Careers: Over 50,000 jobsonline.

Hi Varathu,

There are lots of good books on spectroscopy which can give you a great
deal of information about the questions you are asking.

http://www.wiley.com/WileyCDA/WileyTitle/productCd-0471974218.html (High
Resolution Spectroscopy, Second Edition
J. Michael Hollas)

Anyway, it has do with the derivation of the selection rules for these
spectroscopies.

In IR, if you look at the basic eqaution of the transition moment
integral, we have dipole moment in it. This term is then expanded. After
applying the orthogonality theorem, one gets the selection rules for IR
which says that the dipole moment has to change along that coordinate. I
am sure you may not want to go into details unless and until you are
really after something. I guess the convention is to accept these
selection
rules (rules which define why we see some peaks in spectra and why not
other).

The answer for MW is also similar.

I hope Ms. Vandana will agree with this answer.

Thanks

- Rahul

Purdue University,
West Lafayette, IN 47907

*************************************************************************
On Sat, 3 Jul 2004, [iso-8859-1] varathu rajan wrote:

> Dear Madam,
>      My question is why a molecule should have permanent dipole moment to
absorb the Micro Wave radiation.
>     In other words why molecules such as Hydrogen does not give rotational
spectra?
> Similarly why symmetrical stretching of  CO2 is Infrred inactive?
>
> Friendly,
> Varathu.
>
> Vandana Sharma <vandanas@...> wrote:
> Dear Varathu,
>
> Could you please elaborate your question.
>
> Regards,
> Vandana
>
>
> Vandana Sharma
> Research Scholar
> Laboratory Astrophysics,
> LAB- 570
> Space and Planetary Atmosphere Division,
> Physical Research Laboratory,
> Navrangpura,
> Ahmedabad- 380 009
> Gujarat, India
>
> Phone No : (91)-079-6302129-Ext-4570/4567(lab)
> Email : vandanas@...
> van_res@...
> URL : http://www.prl.ernet.in/~vandanas
>
> On Thu, 24 Jun 2004, [iso-8859-1] varathu rajan wrote:
>
> > Dear Friends,
> >
> > I have a dobt in the fundamentals of spectrosopy.
> > My doubt is
> > 1.For a molecule to be MW active,why it should have permanent Dipole moment
&.
> > 2.To be IR active, why a molecule should undergo net change in its dipole
moment?
> >
> > Plz clear my doubts
> >
> > Friendly,
> > Varathu
> >
> >
> >
> > Yahoo! India Matrimony: Find your partner online.
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
> Yahoo! India Careers: Over 50,000 jobsonline.

Dear Varathu,

Could you please elaborate your question.

Regards,
Vandana


Vandana Sharma
Research Scholar
Laboratory Astrophysics,
LAB- 570
Space and Planetary Atmosphere Division,
Physical Research Laboratory,
Navrangpura,
Ahmedabad- 380 009
Gujarat, India

Phone No : (91)-079-6302129-Ext-4570/4567(lab)
Email : vandanas@...
van_res@...
URL : http://www.prl.ernet.in/~vandanas

On Thu, 24 Jun 2004, [iso-8859-1] varathu rajan wrote:

> Dear Friends,
>
> I have a dobt in the fundamentals of spectrosopy.
> My doubt is
> 1.For a molecule to be MW active,why it should have permanent Dipole moment &.
> 2.To be IR active, why a molecule should undergo net change in its dipole moment?
>
> Plz clear my doubts
>
> Friendly,
> Varathu
>
>
>
> Yahoo! India Matrimony: Find your partner online.




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