Colorimetry

I was sitting with some friends drinking tea in glasses.
I noticed some people like "weak" tea and others like their tea "strong".
Technically "weak" tea isn't "weak" at all ... it's really a more dilute solution of tea, while "strong" tea is a more concentrated solution of tea.
But what I noticed most is that "weak" tea is less of a brown colour than "strong" tea, so it ought to be possible to guess the concentration of "tea" in a glass of tea by looking at its colour.
However, I wouldn't have to guess the concentration if I had a colorimeter because a colorimeter would measure the absorbance of each tea solution.
It may seem like a lot of hard work for very little reward ... "I'll like a 0.341 absorbance glass of tea please..." .... but colorimetry is useful tool for measuring the concentration of coloured solutions as you will find out in AUS-e-TUTE's new set of colorimetry resources.
AUS-e-TUTE Members should log-in to use the colorimetry resources listed under "Spectroscopy" and the subheading "Absorption Spectroscopy".
Non-members can access a "free-to-view" tutorial at https://www.ausetute.com.au/colorimetry.html