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Publié par | hardet2012 |
Publié le | 10 janvier 2014 |
Nombre de lectures | 18 |
Langue | English |
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10 janvie2r014[HARDETAIMLAIN NGOMA
EDLEavelength
Indefinitionߣ=ܿܶ , the photon energy due to an electron transition between an upper
atomic level k (of energy Ek) and a
lower lev݅elis∆ܧ= ܧ− ܧ=ℎߴ andߴ=ଵ்
Whereߣ:,htveWangleℎ: Planckconstant,ܧ:Energy transitionsߴ,:frequency.
The wavelength in vaciusuࣅm=ࡱ∆ࢉࢎherethe photon energyleerocttueanodn
transition between an upper atomic level k (of energy Ek) and a
lower leveilsiexpresesdinܿ݉ିଵ.
ଷ.ଵఴ
AN:ߣ௩=,ଶ.∆ଵషாయర×
Or1ܸ݁= 8065,541ܿ݉ିଵ= 1,602.10ିଵଽ= 1239,842݊݉
Wemustocnvert ∆ܧinܿ݉ିଵrehweߣ௩=భ,బలబలఴమ.ଵఱభ,,ఱబଽరష଼భభవ.∆ଵாష(మఱషభ)
=> ߣ௩= ∆ா(ଵభషషమ) ,nemeastemcrusaretsaccruhteomtroscopiatespec
determinationswoafvelengthࣅ࢜ࢇࢉ,inuehtingtbemtheter or one of its multliipkle s
and we ha:ve
ࣅ࢜ࢇࢉ(ࢉ) =ࣅ࢜ࢇࢉ() ×ିૢ
A measurement ofoanorwer,numbwaveyc,uqneferitsetienethfoeyi(hnlevatgne
vacuum)isanequallyaccurateindaetonsionfcettheermotherishseped of light is exactly
defined.Themostcommonwavelengatrheutnhietsnanometer(nm)Å,ntghsetröm
(1 = 10ିଵ݊݉) and the micrometߤe݉r).(
10 janvie2r014[HARDETAIMLAIN NGOMA
=> ࣅ࢜ࢇࢉ()=ିૢ×∆ࡱି(ࢉି)=∆ࡱ(ࢉିૠ)
Wavelength in: vacuum below 200 nm, air between 200 and 2000 nm, vacuum above 2
nm;andthewavelengthins:air i
ࣅࢇ࢘=ࣅ࢜ࢇࢉ
Where,
=+,ૡ+[..,ି(.∆ࡱૠ)]+ [,ૡ,ૢ.ૢૢૠ.ି(∆ࡱ)]
Is EDLENformulation
The wavenumber in vaciusuߪm=ఒೡೌଵ()=ఒଵೡೌఴ(ܿ݉ିଵ) SI wavenumbeirt, theun
istheinversemeter,bpurtaicnticewavenumbersareusuallyexpressedin
inverse centimete1rܿs݉:ିଵ= 10ଶ݉ିଵ, equivalentt.2o7994295180ସx MHz.
Weremarkatththephotonwavelengtdhuetothewavelengthinvacaunudm
a the wavelengthaisirn∆ߣ(݊݉) =ߣ௩− ߣ.