
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
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March 16th, 2015, 03:18 AM  #1 
Newbie Joined: Mar 2015 From: Australia Posts: 5 Thanks: 0  A=10 times log(Pin/Pout)?
Good day, I am not sure if logs belong here. Please excuse. In photonics, I am not sure what this means. A and P? Amps, Photons, Decibels? A = 10 times log(Pin/Pout) It is physics and maths, in relation to light and optic fibres and maybe attenuation. What is the eqauation for? 
March 16th, 2015, 03:31 AM  #2 
Senior Member Joined: Apr 2014 From: Glasgow Posts: 2,150 Thanks: 730 Math Focus: Physics, mathematical modelling, numerical and computational solutions 
I don't know the answer to this, but a quick search of this equation in Google yielded some search results applicable to describing power output in decibels. See for example: http://www.wirelessapplications.com/...conv_Final.pdf I'm not sure why you would ever want to use this equation for photonics. Perhaps you have a microphone in your setup that is converting sound to electrical signals to photons in an optic fibre? 
March 16th, 2015, 03:37 AM  #3 
Math Team Joined: Jul 2011 From: Texas Posts: 2,883 Thanks: 1503  
March 16th, 2015, 08:54 AM  #4 
Newbie Joined: Mar 2015 From: USA Posts: 1 Thanks: 0 Math Focus: http://downloadfullhdmovie2364.blogspot.com/2015/03/thegunmandownloadfullhdmovie.html  The Gunman : Download Full HD Movie
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