Hi MANG2004, #9}E@GGs
s;X"E=
I am curious about your calculation, too. Plus, the definition of σ refers to 1/e^2 width not the FWHM. Even your calculation/defintion is correct. I have a doubt that it will work when the specualr incident ray angle is not normal......... :\L{S
_Xd,aLoo
For thsoe who knows it better, please have some input. I am rather curious, too!! Thanks!!