在光度法中,非单色光导致对比尔定律的偏离,经过理论分析和实验证实,当入射谱带的波长区域越宽时,反而越有利于接近比尔定律,特别是在吸收曲线斜率变化不大的区域内更是如此。进一步从等吸收点论证了单色吸收是比尔定律成立的充分条件,并不是必要条件。 In the photometric method, the non-monochromatic light leads to the deviation of the Beer’s law. After theoretical analysis and experiments, it is confirmed that when the wavelength band of the incident band is wider, the closer to Beer’s Law, the better. Especially when the slope of the absorption curve does not change This is especially true in large areas. Further evidence from the absorption point monochromatic absorption is the sufficient conditions for the establishment of Bill’s Law is not a necessary condition.