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Published byJake Rimel Modified over 9 years ago
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Espectro de luz visible Absorción de luz-estructura molecular
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Luz incidente: I 0 Luz absorbida: Ia Absorbancia: A = -log T = .b.c : Coeficiente de absorción molar ; [ ] = M -1 cm -1
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Rango Espectral / nm [1nm = 10 -9 m] E/ kJm -1 Rayos 10 -3 1,2x10 8 Rayos X 10 -1 – 30 1,2 x 10 6 – 3984,8 Ultravioleta (Uv) 200 – 350 597,7 – 341,5 Visible 400 – 700 298,9 – 170,9 Infra-rojo (IR) 1000 – 10 4 119,5 – 12,0 Micro-ondas 10 7 – 10 9 1,2 x 10 -2 – 1,2 x 10 -4 Ondas de Radio10 11 1,2 x 10 -6 E = N hc/ = 1,197 x 10 -4 / [kJ mol -1 ] Energía de unión más representativas (kJ/mol) H-H C-H C-C C-N C-O O-H N-N 435414347293351464389
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max = 211 nm max = 278 nm
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max = 255 nm max = 271 nm
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may = 525 nm max = 544 nm max = 646 nm
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max = 396 nm max = 408 nm
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max = 698 nm max = 674 nm max = 784 nm
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Diagrama de Jablonsky
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hh
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Clorofila a Clorofila b caroteno
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X UV Vis IR ondas radio UVC UVB UVA 100 280 320 400 700 nm Filtro UVB Ozono Filtro UVB + UVA
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Eumelanina Feomelanina
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Fórmulas químicas BF3 OT BMBM MBC OMC
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FILTROS SOLARES OT = octiltriazona BMBM = butilmetoxidibenzoilmetano OMC = octilmetoxicinamato MBC = metilbencilidencanfor BF3 = benzofenona 3
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