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1.2 ERRORS AND UNCERTAINTIES Notes - IB Physics at SAS

1 ERRORS AND UNCERTAINTIES Notes I. uncertainty AND ERROR IN MEASUREMENT Physics is an experimental science. All physical laws, theories, and formulae were developed based on measurements of things. All measurements in science suffer from uncertainty which results from unavoidable ERRORS . No matter how hard we try to control things, some level of experimental error is unavoidable. A source of error may be one of a number of things, or any number of those things. No measuring instrument is perfect! Reporting experimental results with appropriate uncertainty and following these through in calculations is a critical part of IB Physics . CRUCIAL THINGS TO KNOW: An error is the difference between the measured value and the expected value of something (unavoidable). An uncertainty is a way of expressing or summarizing the error (unavoidable). A mistake is simply not doing something correctly through carelessness (avoidable).

1.2 ERRORS AND UNCERTAINTIES Notes I A. PRECISION AND ACCURACY B. RANDOM AND SYSTEMATIC ERRORS C. D. REPORTING YOUR BEST ESTIMATE OF A MEASUREMENT II I. UNCERTAINTY AND ERROR IN MEASUREMENT Physics is an experimental science. All physical laws, theories, and formulae were developed based on

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