 In the Beer–Lambert law, varying concentration and path length has an equivalent effect—diluting a solution by a factor of 10 has the same effect as shortening the path length by a factor of 10.If cells of different path lengths are available, testing if this relationship holds true is one way to judge if absorption flattening is occurring.Solutions that are not homogeneous can show deviations from the Beer–Lambert law because of the phenomenon of absorption flattening.