So i am in the middle of a physical chemistry laboratory and i have built a sort

Question

So i am in the middle of a physical chemistry laboratory and i have built a sort a sort of self-made spectrometer with a photodiode and LED to detect the voltage drop as a solution is increasingly concentrated with solute/analyte. The multimeter measures the voltage drop across the photodiode as more solute is added. How does one convert voltage into units of light intensity which is what i need in order to find the absorbance? It would also be helpful to know how to calculate current into light intensity since the specs of the LED incident intensity are in amps, although i understand how to convert the voltage into current using ohm's law.

Explanation / Answer

HENCE: as intensity increases voltage increases? is this right? = NO NO NO

Voltage depends on frequency ONLY.

Your measured voltage is dropping at higher current because of resistance, where the voltage drop = IR

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