111I1IWavelength,a (nm)10910131015105101110-310-110310710-111-Frequency,v (Hz)101210101061021020101810161014108104Ultra-RadioGammaTypeofradiationX-ray violetInfrared Microwave waveray400700VisiblespectrumHigh energy++LowenergyElectromagneticspectrum.Wavelength(a)andfrequency(v)areinverselyrelated.Our eyes are sensitivetoonlya narrowrange of wavelengthsofradiation,thevisibleregion,which extendsfrom about 400 nm (violet)to about700nm (red).Short-wavelength(high-frequency)lighthas ahigh energy content; longwavelength (low-frequency)light has a low energy content.Figure 3-4
Figure 3-4
OnewavelengthFigure 3-4-17Longerwavelength76onmTv andradiowavesRed700 nmMicro-wavesorangeInfrared600nmcolorspectrumVisibleYellowof visibleUVlightGreenX rays500nmBlueGammaraysViolet400 nm380mmElectromagneticspectrumShorterwavelengthWaves ineiectronmagneticThespectrunm.have similar properties buttheelectromagneticspectrummethods ofproduction.Radiodifferent wavelengthsamdwithlongest(andieastenergeticwaves,wavesVarethe20are thekm.Gammarayswaveiengthsasiongasvisiblelightenergetic)wavesshortest(andmostoftheelectromagneticspectrumracrepresentssmaOfromofwaveiengthsrangimgandconsistsmixtureTvisibleThefromapproximately386760nmi.energylightisusedinphotosynthesis
Figure 3-4-1
10080Chlorophyllb60Chlorophyll a4020500700400600Wavelength (nm)Figure 3-5
Figure 3-5
280a-Caroten240(ao2001Xanthophyli160h1208040O400420440460500480520Fig.3-6入/nm
Fig.3-6
E2ndexcited singlet stateHeatElstexcited singlet stateodosioiTripletsHeatwwozostFig. 3-7Eground state
Fig. 3-7