faq6 - FREQUENTLY ASKED QUESTIONS February 8, 2012 Content...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: FREQUENTLY ASKED QUESTIONS February 8, 2012 Content Questions How do we use the formula I , where its all differentials? The formula for I , the specific intensity, is a distribution (sometimes called a differential distribution): this is a very important kind of function that is used often in science and engineering. I think the best way to think of a distribution f ( x ) = dn ( x ) dx is as a his- togram , for which the bins are taken to be infinitesimally small. First think of a histogram, with M bins of finite size x i . You have a total of N items (people, photons, chunks of energy, gallons of water, whatever) to be dis- tributed among the bins. Bin i has n i of them, such that M i =1 n i = N . So what the histogram describes is number of items per x as a function of x , or, for a continuous quantity, amount of stuff per x as a function of x . In the limit that the bin width gets infinitesimally small, x dx , the distribution can be described as...
View Full Document

This note was uploaded on 02/26/2012 for the course PHYSICS 105 taught by Professor Kruse,m during the Spring '08 term at Duke.

Page1 / 2

faq6 - FREQUENTLY ASKED QUESTIONS February 8, 2012 Content...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online