Question

Which of the following is not a limitation of Beer Lambert’s law, which gives the relation between absorption, thickness and concentration?

(a) Concentration must be lower

(b) Radiation must have higher bandwidth

(c) Radiation source must be monochromatic

(d) Does not consider factors other than thickness and concentration that affect absorbance

This question was addressed to me by my college professor while I was bunking the class.

My doubt is from Introduction to UV Visible Spectrometers topic in section Colorimetry and Spectrometry of Analytical Instrumentation

Answer 1

Right choice is (b) Radiation must have higher bandwidth

The explanation is: The law is derived assuming that the radiation is monochromatic. So, if bandwidth increases it will create deviation.