(a) A solution of thickness 2 cm transmits $25 \%$ of incident light. Calculate the concentration of solution. Molar extinction coefficient of the solution is $4500 \mathrm{dm}^{3} \mathrm{~mol}^{-1} \mathrm{~cm}^{-1}$.
Explanation
The Beer-Lambert law is a fundamental principle in spectroscopy. It relates the absorbance of a solution to its concentration and molar extinction coefficient. By applying this law, we can calculate the concentration of a solution from its absorbance and other known parameters.
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