（二）計算題及問答題

1. $A^* \xrightarrow{k_f} A + h\nu$，$A^* \xrightarrow{k_{non-rad}} A + heat$，where $k_f$ and $k_{non-rad}$ are the rate constants of fluorescence and non-radiation processes, respectively. Find the fluorescence quantum yield ($\Phi_f$) in this system. (4 分)

ar. (4分)