While the gas medium is isothermal uniformed, the dissertation calculates the effectiveabsorptioncoefficient, the Planck-mean absorption coefficient and the wall-incident mean coefficient.
当气体介质等温、均匀时，分别计算气体介质的普朗克平均吸收系数、有效吸收系数和壁面入射平均吸收系数。
2
Separate expressions for the transmitted, and multiply diffracted power are obtained, which enable the effectiveabsorptioncoefficient to be calculated.