A person, whose profile got deleted answered the question "How can I convert absorbance data in UV-visible spectrophotometer at 600 nm to turbidity (cm-1)?" To which the last answer was as follows:

"Dear Saman,

You can calculate turbidity base on following equation:

Turbidity=(2.3*A)/L, where A is the absorbance and L the optical path length.

The unit would be cm-1"

I'm just wondering where he got the 2.3 from. And if it's not clear, then my question becomes, how do you calculate Turbidity as NTU from absorbance?

Reference:

How can I convert absorbance data in UV-visible spectrophotometer at 600nm to turbidity (cm-1) unit? | ResearchGate. (z.d.). ResearchGate. https://www.researchgate.net/post/How_can_I_convert_absorbance_data_in_UV-visible_spectrophotometer_at_600nm_to_turbidity_cm-1_unit