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!

Converting w/m2 to uJ/mm2, 4usec pulse

  1. Dec 3, 2015 #1
    I need to convert light energy: 138W/m2 to uJoules / mm2, at a 4usec pulse

    J = W * seconds
    J = 138 W/m2 * 4e-6
    = 5.54e-4 J/m2

    5.54e-4 J/m2 = 5.54e-4 uJ/mm2

    5.54e-4 uJ/mm2

    Does this look correct?
  2. jcsd
  3. Dec 3, 2015 #2


    User Avatar
    Science Advisor
    Homework Helper

    It is correct if the light pulse can be assumed to have a box car shape in time.
  4. Dec 4, 2015 #3
    Thanks blue_leaf. Yes, I have nice controlled square pulses. I was given some numbers to beat by a Xenon strobe, but the numbers seemed off. Good to know.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook