- #1
dobbinatrix
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I need to calculate the intensity of a 10000 lux light source traveling through 3.3 cm of water.
I have attempted to solve this using the equation I=Ioe-A where i is the intensity, Io is the initial intensity, A is the absorbance calculated as the water attenuation coefficient times the depth, using the water attenuation coefficient of 0.23222 (this could be wrong?)
This equation can be simplified into I=Io*10^-A
however when i plug my numbers into this i seem to get I=10000*9.9 which means that the intensity has increased tenfold in 3cm of water.
Somthing tells me I am wrong...
Any help would be greatly appreciated
P.S. thanks to ehild for last response
I have attempted to solve this using the equation I=Ioe-A where i is the intensity, Io is the initial intensity, A is the absorbance calculated as the water attenuation coefficient times the depth, using the water attenuation coefficient of 0.23222 (this could be wrong?)
This equation can be simplified into I=Io*10^-A
however when i plug my numbers into this i seem to get I=10000*9.9 which means that the intensity has increased tenfold in 3cm of water.
Somthing tells me I am wrong...
Any help would be greatly appreciated
P.S. thanks to ehild for last response