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

[jstamour802]

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

answer:
5.54e-4 uJ/mm2Does this look correct?

 

[blue_leaf77]

It is correct if the light pulse can be assumed to have a box car shape in time.

 

[jstamour802]

It is correct if the light pulse can be assumed to have a box car shape in time.

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.