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Essay on Buffons Needle | ||
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This is the first 1,000 characters of 239 words (0.96 pages) in the essay titled Buffons Needle Buffon s Needle refers to a simple Monte Carlo method for the estimation of the value of pi, 3.14159265... The idea is very simple. Suppose you have a tabletopwith a number of parallel lines drawn on it, which are equally spaced (say the spacing is 1 inch, for example). Suppose you also have a pin or needle, which is also an inch long. If you drop the needle on the table, you will find that one of two things happens: (1) The needle crosses or touches one of the lines, or (2) the needle crosses no lines. The idea now is to keep dropping this needle over and over on the table, and to record the statistics. Namely, we want to keep track of both the total number of times that the needle is randomly dropped on the table (call this N), and the number of times that it crosses a line (call this C). If you keep dropping the needle, eventually you will find that the number 2N/C approaches the value of pi! Why does this work? It is not hard to show, with a little bit of calculus, that the probability on any given drop of the needle that it should cross a line is given by 2/pi. After many trials, the value of C/N, the number of crossing needles divided by the total number of needles, will approach the value of the probability. Bibliography: http://www.angelfire.com/wa/hurben/buff.html ... |
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Keywords: value of pi, crosses, angelfire, buffon, needles, probability, drop the needle, monte carlo method, parallel lines, lines drawn, 2n, calculus, buff, estimation, tabletop, randomly