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phy131studiof15:lectures:chapter1 [2015/08/24 08:49]
mdawber [Stating errors]
phy131studiof15:lectures:chapter1 [2015/08/24 08:51]
mdawber [Visual comparison of different types of eror]
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 {{http://​ic.sunysb.edu/​Class/​phy133s/​vidspics/​bullsyefourframesd.png}} {{http://​ic.sunysb.edu/​Class/​phy133s/​vidspics/​bullsyefourframesd.png}}
  
-Think of the round object as an archery target. ​ The archer shoots some number of arrows at it, and each dot shows where one landed. ​ Now think of the "​bull'​s eye" -- the larger black dot in the center -- as the "​true"​ value of some quantity that's being measured, and think of each arrow-dot as a measurement of that quantity. ​ The problem is that the one doing the measurements does not know the "​true"​ value of the quantity; ​s/​he'​s ​trying to determine it experimentally,​ and this means there must be uncertainty associated with the experimentally determined value. ​ Note that each archery target ​-- we'll call them 1,2,3,4 from left to right -- shows a different distribution of arrow-hit/​measurements.  ​+Think of the round object as an archery target. ​ The archer shoots some number of arrows at it, and each dot shows where one landed. ​ Now think of the "​bull'​s eye" -- the larger black dot in the center -- as the "​true"​ value of some quantity that's being measured, and think of each arrow-dot as a measurement of that quantity. ​ The problem is that the one doing the measurements does not know the "​true"​ value of the quantity; ​they are trying to determine it experimentally,​ and this means there must be uncertainty associated with the experimentally determined value. ​Each archery target shows a different distribution of arrow-hit/​measurements.  ​
  
  
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