September 28, 2012

What is measurement? Explain the significant of measurement.


Measurements: The measurement of a given quantity is essentially an act or the result of comparison between the unknown quantity and a predefined standard. 

In fact, the measurement is the process by which one can convert physical parameters to meaningful numbers. 

In order that the result of the measurement is meaningful, there are two basic requirements: 
  1. The standard used for comparison purpose must be accurately defined and should be commonly accepted and, 
  2. The apparatus used and the method adopted must be provable. 

Significance of measurements: The importance of measurement is simply expressed in the following statement of ‘Lord Kelvin’: “I often say that when you can measure what you are speaking about and can express it in numbers, you know something about it; when you cannot express init numbers your knowledge is of a meagre and unsatisfactory kind.”

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