1. ## light intensity equation

I have an equation I need help solving that deals with light intensity.

Ez = E0 * e(-k*z) is the formula with all the variables.

The equation I need to solve is Ez = 25,000 lux * e (.12 m^-1 * 5m) where (e) is exponential function.

Thanks to all.

2. ## Re: light intensity equation

note that ...

$0.12m^{-1} \cdot 5m = 0.6$

3. ## Re: light intensity equation

given that light intensity declines exponentially with depth, how does that work with the above equation. do i take e^.6 m and subtract that from 25,000 lux?

4. ## Re: light intensity equation

Originally Posted by onaslowtrain
given that light intensity declines exponentially with depth, how does that work with the above equation. do i take e^.6 m and subtract that from 25,000 lux?
Huh? 25000 * e^.6 = ~45553