lololololol haha i just had an urge to point that out LOL
yes because euclidean geometry was considered when they named it the calibration curve
haha
lol shows why chemists will never be true mathematicians
* Mao loads shotgun
Nah I kid.
but yes, kudos to kids who've taken their time to research the topic. The Generalized Beer-Lambert law only holds when there's no (or very small amount) of intermolecular interactions (i.e. the compound you are studying do not interact with each other).
As concentration gets large, these interactions become significant, and can often result in polymerization, coordination and all sorts of crazy things, which changes just about every parameter in the generalized Beer-Lambert law.
The accuracy (and linearity) of a spectrometer thus is really limited by the sensitivity of the optical detector. More sensitive optical detectors can detect smaller changes in concentrations, thus allow the use of lower concentrations, and more empirically correct data.