Post on 08-Jan-2020
160225 Atomfysikk2F.notebook
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February 25, 2016
Apr 1110:34 AM
Overganger mellom energinvåerHvordan får vi atomer opp i energinivåer over grunntilstanden?1.Varm opp atomene2.Send strøm gjennom gass3.Send lys gjennom gass
Feb 231:47 PM
Bohrs postulater:• Et atome kan eksistere i noen bestemte tilstander uten å miste
energi så lenge det er i den tilstanden• Hvis et atom går fra en energitilstand til en annen med lavere
energi, blir hele energiforskjellen sendt ut som ett enkelt foton
160225 Atomfysikk2F.notebook
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February 25, 2016
Apr 1111:54 AM
Apr 1111:43 AM
Spektroskopi
Prisme (brytning) Gitter (interferens)
160225 Atomfysikk2F.notebook
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February 25, 2016
Apr 1111:40 AM
Apr 111:22 PM
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February 25, 2016
Apr 110:52 AM
Emissjonsspekteret er karakteristisk for hver gass, og forteller hvilke mulige energiforskjeller det er mellom energinivåene.
Apr 1111:10 AM
Hydrogen
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February 25, 2016
Apr 111:34 PM
An emission spectrum for hydrogen can be obtained by analyzing the light from hydrogen gas that has been heated to very hightemperatures ﴾the heating populates many of the excited states of hydrogen﴿. An absorption spectrum can be obtained by passinglight from a broadband incandescent source through hydrogen gas. If the absorption spectrum is obtained at room temperature, when all atoms are in the ground state, the absorption spectrum will
1. be identical to the emission spectrum.2. contain some, but not all, of the lines appearing in the emission spectrum.3. contain all the lines seen in the emission spectrum, plus additional lines.4. look nothing like the emission spectrum.
Apr 111:40 PM
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February 25, 2016
Apr 111:41 PM
Solspekteret
Feb 2310:39 AM
Eksempler på prosesser med absorpsjon og emisjon av stråling
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February 25, 2016
Apr 410:20 AM
Fotoelektrisk effekt
Eksperimentelle fakta: • f<fg: Ingen elektroner uansett
hvor stor intesitet• f>fg: Elektroner uansett hvor
liten intesitet.
Apr 410:40 AM
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February 25, 2016
Apr 410:45 AM
Røntgenstråling
Bremsestråling
Apr 411:16 AM
Røntgenspekteret
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February 25, 2016
Apr 111:46 PM
Lysrør: fluorescens
Apr 114:38 PM
1 405.4 mercury 404.6562 436.6 mercury 435.8333 487.7 terbium from Tb3+ ~485 to 4904 542.4 terbium from Tb3+ ~543 to 5445 546.5 mercury 546.0746 577.7 likely terbium from Tb3+ or mercury 576.960 for Hg or ~578 for Tb7 580.2 mercury or terbium from Tb3+ 579.066 for Hg or ~580 for Tb8 584.0 possibly terbium from Tb3+ or europium in Eu+3:Y2O3 ~5809 587.6 likely europium in Eu+3:Y2O3 ~58710 593.4 likely europium in Eu+3:Y2O3 ~59311 599.7 likely europium in Eu+3:Y2O3 ~59812 611.6 europium in Eu+3:Y2O3 ~61113 625.7 likely terbium from Tb3+ ~62514 631.1 likely europium in Eu+3:Y2O3 ~63015 650.8 likely europium in Eu+3:Y2O3 ~65016 662.6 likely europium in Eu+3:Y2O3 ~66117 687.7 likely europium in Eu+3:Y2O3 ~68768818 693.7 likely europium in Eu+3:Y2O3 ~69319 707 and 709 likely europium in Eu+3:Y2O3 ~707 and ~70920 712.3 likely europium in Eu+3:Y2O3 ~71221 760.0 likely argon 758.9315 or 763.5106 ﴾??﴿22 811.0 likely argon 811.531
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February 25, 2016
Apr 114:52 PM
Fluorescensmikroskopi
Apr 112:03 PM
Endothelial cells under the microscope. Nuclei are stained blue with DAPI, microtubles are marked green by an antibody bound to FITC and actin filaments are labelled red with phalloidin bound to TRITC. Bovine pulmonary artery endothelial cells
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February 25, 2016
Apr 1512:55 PM
Fotokjemiske reaksjoner: Fotosyntese2 H2O + 2 NADP
+ + 3 ADP + 3 Pi + light 2 NADPH + 2 H+ + 3 ATP + O2
Apr 112:05 PM
Fotoreseptorer i øyet
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February 25, 2016
Apr 112:05 PM
Bioluminescens
Apr 112:07 PM
Lysdioder
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February 25, 2016
Apr 112:06 PM
LaserSpontan emissjon
Stimulert emissjon
Apr 112:06 PM
Laser
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February 25, 2016
Apr 113:46 PM