11 May '09 10:153 edits

I want to know how to calculate the radiance emitted over a given frequency/wavelength range at a given blackbody temperature. So I tried looking it up:

http://en.wikipedia.org/wiki/Planck's_law

“…The radiance emitted over a frequency range [v1,v2] or a wavelength range [Y1,Y2] = [c / V2,c / v1] can be obtained by integrating the respective functions….” (actually it wasn’t quite “[Y1,Y2]” but it is impossible to copy and past what it does say there into this post)

-it then gives an integral equation below that but it is a very long time since I have done integral calculus and I have given up in frustration trying to understand this.

Can anyone give me an example of a specific calculation using that formula of the radiance emitted over the wavelength range [2.3nm, 4.0nm] at the blackbody temperature of 100C (thus 373.15K for this calculation) ? -if I can just see one working example then I am sure I will get it. Any help would be very much appreciate.

http://en.wikipedia.org/wiki/Planck's_law

“…The radiance emitted over a frequency range [v1,v2] or a wavelength range [Y1,Y2] = [c / V2,c / v1] can be obtained by integrating the respective functions….” (actually it wasn’t quite “[Y1,Y2]” but it is impossible to copy and past what it does say there into this post)

-it then gives an integral equation below that but it is a very long time since I have done integral calculus and I have given up in frustration trying to understand this.

Can anyone give me an example of a specific calculation using that formula of the radiance emitted over the wavelength range [2.3nm, 4.0nm] at the blackbody temperature of 100C (thus 373.15K for this calculation) ? -if I can just see one working example then I am sure I will get it. Any help would be very much appreciate.