Explanation:
The beer - lambert law measures the amount of radiation being absorbed when it is passed through the solution .
This formula is as follows -
A= log₁₀ ( I₀ / I ) = Elc
Where,
E = is abosorption co-efficient
c = Concentration of the solution,
l = Length of the light path
In case of the stock solution, the concentration of blue dye is very high and we see absorbance nearly at 3.0 . But when we dilute the solution, the moles of blue dye remains same as before ( i.e as in stock solution) .
Hence ,
The radiation passing through the solution will eventually interact with same number of moles of blue dye in diluted solution and give absorbance nearly 3.0
