Quote from: Cyber-Angel on March 14, 2007, 07:10:39 PM
Dark Fire, 
Every thing one could want to know about the attenuation of light is more then likely on the Internet: in the mean time have a look at this Paper which is in PDF format which maybe of interest: 
http://nestor.org.gr/2nd/files/247_252_bradner.pdf
This may also be of interest its an article on Light attenuation and exponential laws by Ian Garbett which has that math your looking for: 
http://plus.maths.org/issue13/features/garbett/index.html
I hope these help there's lots out there on the subject. 
Regards to you. 
Cyber-Angel  
I was thinking more of a single website or book that contains all of the random advanced physics that pops up on these forums, like the wake angles and structure, so I can know more about the physics before somebody asks about it.