spectre atomice

5/26/2018 Spectre Atomice

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Prof. Elena Rducanu, Colegiul Naional Bnean,Timioara


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Spectroscopie, spectroscop

Spectroscopia,ramur a fizicii care se ocup cu studiul metodelor deobinere a spectrelor, precum i cu msurarea i interpretarea acestora

Spectroscopul,aparat spectral, cu prism sau cu reea de difracie,destinat observrii directe a spectrelor, folosind ca receptor ochiul


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Prile componente le spectroscopului

Prisma

Fanta

Colimatorul

Luneta

Sursaspectral

Ob

Oc

Imaginea

http://www.youtube.com/watch?v=uEf5svE5fB0&feature=related
http://www.youtube.com/watch?v=uEf5svE5fB0&feature=relatedhttp://www.youtube.com/watch?v=uEf5svE5fB0&feature=related


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Colimatorul transform fasciculul divergent ntr-un fascicul paralel

Sursa spectralce urmeaz a fi analizat lumineaz fanta situatn planul focal al lentilei colimatorului

Prismase aeaz de obicei sub unghiul de deviaie minim pentru aelimina deformaiile imaginii fantei

Fasciculul de lumin trecnd prin prism se descompune prin dispersiei iese sub form de fascicule de diferite culori, n funcie de lungimeade und.

Luneta folosit pentru observarea spectrelor este acomodat pentruinfinit

http://www.youtube.com/watch

?feature=endscreen&NR=1&v=f

RedvbiXF1c
http://www.youtube.com/watch?feature=endscreen&NR=1&v=fRedvbiXF1chttp://www.youtube.com/watch?feature=endscreen&NR=1&v=fRedvbiXF1chttp://www.youtube.com/watch?feature=endscreen&NR=1&v=fRedvbiXF1chttp://www.youtube.com/watch?feature=endscreen&NR=1&v=fRedvbiXF1c


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http://www.youtube.com/watch?v=2tZ6plRHLMg
http://www.youtube.com/watch?v=2tZ6plRHLMghttp://www.youtube.com/watch?v=2tZ6plRHLMg


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iferite surse spectrale i spectre


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CD-ul cel mai simplu spectroscop

http://www.youtube.com/watc

h?v=-

cH_2mbsvBo&feature=related
http://www.youtube.com/watch?v=-cH_2mbsvBo&feature=relatedhttp://www.youtube.com/watch?v=-cH_2mbsvBo&feature=relatedhttp://www.youtube.com/watch?v=-cH_2mbsvBo&feature=relatedhttp://www.youtube.com/watch?v=-cH_2mbsvBo&feature=related


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Spectre

Spectrueste ansamblu de imagini ale fantei de intrare a unui aparatspectralnumite linii spectrale, rezultate n urma descompuneriiluminii albe

Aceste imagini corespund tranziiilor electronilor ntre nivele energeticeale atomilor sau moleculelor n consecin spectrele pot fi atomice

sau moleculare

n funcie de energia antrenat la tranziiile electronilor, exist spectrede emisiesau de absorbie


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Spectre de emisie

Spectrul de emisiecuprinde totalitatea tranziiilor radiative de penivele energetice superioare ale atomilor sau moleculelor unei substanepe nivele inferioare

Spectrul de emisie poate fi:

Spectru continuucaracteristic corpurilor solide i lichide aduse laincandescen, este o succesiune continu de culori: rou,portocaliu,galben,verde,albastru,indigoi violet


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Spectru discontinuucaracteristic gazelor incandescente

Spectru de liniiemis de gazele atomice

Spectru de bandemis de gazele moleculare

Se caracterizeaz prin gruparea n benzi a liniilor spectrale


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Spectre de absorbieSpectrul de absorbiecorespunde tranziiilor radiative de pe niveleinferioare pe nivele superioare ale atomilor sau moleculelor

poate fi obinut la trecerea unui fascicul de radiaii cu spectru continuuprin substana cercetat

n urma excitrii electronilor substanei, n fasciculul emergent vor fiabsorbite anumite radiaii, iar intensitatea liniilor sau benzilor spectralecorespunztoare se va micora


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http://www.youtube.com/watch?v=l4yg4HTm3uk&feature=related
http://www.youtube.com/watch?v=l4yg4HTm3uk&feature=relatedhttp://www.youtube.com/watch?v=l4yg4HTm3uk&feature=related


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Exemple de spectreHidrogen ( H )

spectru de emisie

spectru de absorbie

Carbon ( C )

spectru de emisie

spectru de absorbie


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Clor ( Cl )

spectru de emisie

spectru de absorbie

Natriu ( Na )

spectru de emisie

spectru de absorbie

http://www.youtube.com/watch?v=hO2m94rxpkM&feature=related
http://www.youtube.com/watch?v=hO2m94rxpkM&feature=relatedhttp://www.youtube.com/watch?v=hO2m94rxpkM&feature=related


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http://www.youtube.com/watch?v=2ZlhRChr_Bw&feature=related
http://www.youtube.com/watch?v=2ZlhRChr_Bw&feature=relatedhttp://www.youtube.com/watch?v=2ZlhRChr_Bw&feature=related


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http://www.youtube.com/watch?v=hO2m94rxpkM&feature=related


http://www.youtube.com/watch?v=2tZ6plRHLMg

http://technology.niagarac.on.ca/sop/Spectroscope.html

http://lifeng.lamost.org/courses/astrotoday/CHAISSON/AT304/HTML/AT30

401.HTM

Bibliografie

http://www.youtube.com/watch?feature=endscreen&NR=1&v=fRedvbiXF1c

http://www.youtube.com/watch?v=-cH_2mbsvBo&feature=related

http://www.youtube.com/watch?v=uEf5svE5fB0&feature=related

http://www.youtube.com/watch?v=2ZlhRChr_Bw&feature=related

http://www.youtube.com/watch?v=l4yg4HTm3uk&feature=related

Rodica Ionescu-Andrei, Cristina Onea, Ion TomaManual de fizic ,clasa a XII-a, Editura ARTD. Ciobotaru, T. Angelescu s.aManual de fizic , clasa a XII-a,

Editura Didactic i pedagogic

Dicionar de fizic
http://www.youtube.com/watch?v=hO2m94rxpkM&feature=relatedhttp://www.youtube.com/watch?v=2tZ6plRHLMghttp://technology.niagarac.on.ca/sop/Spectroscope.htmlhttp://lifeng.lamost.org/courses/astrotoday/CHAISSON/AT304/HTML/AT30401.HTMhttp://lifeng.lamost.org/courses/astrotoday/CHAISSON/AT304/HTML/AT30401.HTMhttp://www.youtube.com/watch?feature=endscreen&NR=1&v=fRedvbiXF1chttp://www.youtube.com/watch?v=-cH_2mbsvBo&feature=relatedhttp://www.youtube.com/watch?v=uEf5svE5fB0&feature=relatedhttp://www.youtube.com/watch?v=2ZlhRChr_Bw&feature=relatedhttp://www.youtube.com/watch?v=l4yg4HTm3uk&feature=relatedhttp://www.youtube.com/watch?v=l4yg4HTm3uk&feature=relatedhttp://www.youtube.com/watch?v=2ZlhRChr_Bw&feature=relatedhttp://www.youtube.com/watch?v=uEf5svE5fB0&feature=relatedhttp://www.youtube.com/watch?v=-cH_2mbsvBo&feature=relatedhttp://www.youtube.com/watch?feature=endscreen&NR=1&v=fRedvbiXF1chttp://lifeng.lamost.org/courses/astrotoday/CHAISSON/AT304/HTML/AT30401.HTMhttp://technology.niagarac.on.ca/sop/Spectroscope.htmlhttp://www.youtube.com/watch?v=2tZ6plRHLMghttp://www.youtube.com/watch?v=hO2m94rxpkM&feature=related

spectre atomice

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