1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: DB to W/m^2

  1. Sep 19, 2009 #1
    1. The problem statement, all variables and given/known data
    I have a test coming up and I need to be able to convert dB to W/m^2 and vise versa. Could someone please explain to me how to do this?

    2. Relevant equations
    B=(10dB) log_10(I/I_0)
    I_0 = 1.0*10^-12W/m^2

    3. The attempt at a solution
    Google, came up with nothing
  2. jcsd
  3. Sep 19, 2009 #2
    Solve for I --- B/(10dB) = log_10(I/I_0)
    10^(B/10dB) = (I/I_0)
    I = (I_0)10^(B/10dB)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook