大学英文的Consider the energy levels E1 and E2 of a two-level system._英语解答

大学英文的
Consider the energy levels E1 and E2 of a two-level system.Determine the population ratio of the two levels if they are in thermal equilibrium at room temperature,27°C,and the transition frequency associated with this system is at 1015Hz.

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解答

我搞不清楚字母应该用什么,就用我自己喜欢的字母好了：
f = ν exp(ΔE / kT),其中,f就是你要的单位时间辐射光子数,ν = 1015 Hz,k用Boltsmann常数,T用开尔文单位.