§10.6 Photochemistry 6.2 Physical processes of Excitation and decay (1)Photoexcitation Radiation-less decay Which is which? radiation v fluorescence ground state singlet ground state radiation 八八、 phosphorescence 4005006007008009001000 Wavelength(nm) ground state 大Radiation-less decay Which is which? 6.2 Physical processes of Excitation and decay (1) Photoexcitation: §10. 6 Photochemistry