Spectre Atomice
Transcript of Spectre Atomice
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Prof. Elena Rducanu, Colegiul Naional Bnean,Timioara
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Prof. Elena Rducanu, Colegiul Naional Bnean,Timioara
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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Prof. Elena Rducanu, Colegiul Naional Bnean,Timioara
Prile componente le spectroscopului
Prisma
Fanta
Colimatorul
Luneta
Sursaspectral
Ob
Oc
Imaginea
http://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
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Prof. Elena Rducanu, Colegiul Naional Bnean,Timioara
iferite surse spectrale i spectre
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Prof. Elena Rducanu, Colegiul Naional Bnean,Timioara
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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Prof. Elena Rducanu, Colegiul Naional Bnean,Timioara
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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Prof. Elena Rducanu, Colegiul Naional Bnean,Timioara
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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Prof. Elena Rducanu, Colegiul Naional Bnean,Timioara
Exemple de spectreHidrogen ( H )
spectru de emisie
spectru de absorbie
Carbon ( C )
spectru de emisie
spectru de absorbie
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Prof. Elena Rducanu, Colegiul Naional Bnean,Timioara
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
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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
Prof. Elena Rducanu, Colegiul Naional Bnean,Timioara
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