rad cn
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Transcript of rad cn
Studiul legilor radiaiei termice de echilibru folosind un model al corpului negru
Scopul lucrrii:Studiul legilor radiaiei termice de echilibru folosind un model al corpului negru. Orice corp a crui temperatur este superioar lui 0 K emite radiaie termic. Un corp negru este corpul care absoarbe toat energia care cade asupra lui.Legea Stefan-Boltzmann: T ()U (mV) (
100-0.014100000000
121-0.004214358881
1420406586896
1600.01655360000
1770.021981506241
1930.031.387E+09
2090.0421.908E+09
2230.0532.473E+09
2360.0743.102E+09
2490.0833.844E+09
2610.0994.64E+09
2710.1145.394E+09
2820.1336.324E+09
2930.1547.37E+09
3030.1758.429E+09
3110.2029.355E+09
3200.2241.049E+10
3290.2521.172E+10
3360.2781.275E+10
3440.3031.4E+10
3510.341.518E+10
3580.3631.643E+10
3640.3941.756E+10
3710.4271.895E+10
3770.4622.02E+10
3830.5022.152E+10
3880.5392.266E+10
3940.5742.41E+10
4000.6112.56E+10
Fig. 1. Dependena tensiunii n funcie de temperatura la puterea a 4a (proporional cu radiana)
Tabel 1. Tensiunea n funcie de creterea temperaturii T ()U (mV)T^4 (C^4)
3020.728318169616
2970.7097780827681
2910.6997170871761
2860.6856690585616
2810.6726234839521
2770.665887339441
2720.6525473632256
2690.645236114321
2650.6294931550625
2610.6184640470641
2570.6074362470401
2530.5984097152081
2500.5853906250000
2460.5753662186256
2430.5643486784401
2390.5543262808641
2360.5423102044416
2330.5322947295521
2300.5222798410000
2280.5122702336256
2260.5052608757776
2230.4932472973441
2200.4812342560000
2170.4752217373921
2150.4662136750625
2120.4592019963136
2100.4471944810000
2070.441836036801
2050.4311766100625
2030.4221698181681
2010.4161632240801
1980.4081536953616
1960.41475789056
1940.3951416468496
1920.3871358954496
1880.3681249198336
1860.3631196883216
1840.3621146228736
1820.3481097199376
1800.3471049760000
1780.3361003875856
1770.333981506241
1750.327937890625
1730.32895745041
1710.315855036081
1700.308835210000
1680.304796594176
1660.292759333136
1640.285723394816
1630.281705911761
1610.275671898241
1600.272655360000
1580.267623201296
1570.262607573201
1550.259577200625
1540.253562448656
1520.248533794816
1510.244519885601
1490.239492884401
1480.235479785216
1470.231466948881
1450.226442050625
Fig. 2. Dependena tensiunii n funcie de temperatura la puterea a 4a (proporional cu radiana)
Tabel 2. Tensiunea n funcie de scderea temperaturii
Cubul lui Leslie:MaterialT(C)U(V)T^4(K^4)
Mat850.2251.65E+10
820.221.59E+10
790.21.54E+10
760.1851.49E+10
730.181.44E+10
700.161.39E+10
670.1451.34E+10
650.1351.31E+10
Lucios850.1251.65E+10
820.1851.59E+10
790.171.54E+10
760.161.49E+10
730.151.44E+10
700.131.39E+10
670.111.34E+10
650.071.31E+10
Alb850.771.65E+10
820.741.59E+10
790.5851.54E+10
760.551.49E+10
730.4851.44E+10
700.521.39E+10
670.5251.34E+10
650.1951.31E+10
Negru851.291.65E+10
821.1351.59E+10
791.0051.54E+10
760.891.49E+10
730.811.44E+10
700.891.39E+10
670.7151.34E+10
650.4351.31E+10
Tabel 3. Valorile datelor Cubul Leslie
Fig. 3. Dependena temperaturii la puterea a 4a n funcie de tensiuneObservam ca indiferent de culoarea alba sau neagra radiatia termica se propaga aproximativ identic. Culoarea este influentata de radiatia electromagnetica reflectata, insa in termodinamica culoarile nu exista.4