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Math Help - light intensity equation

  1. #1
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    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.
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  2. #2
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    Re: light intensity equation

    note that ...

    0.12m^{-1} \cdot 5m = 0.6
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  3. #3
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    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?
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  4. #4
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    Re: light intensity equation

    Quote Originally Posted by onaslowtrain View Post
    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
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