what does sigma refers in physics????What is it's use...
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The term “sigma” refers to “the number of standard deviations (sd)” between the mean and a desired value in a distribution. ... How “Sigma” could be used in Physics is at least one way: a) We can quantify the reliability of the instruments we have that measure physics based phenomena.
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sigma means Stefan boltzmann constant
sigma value equal to 5.67051(19)*10^-8w/(m^2k^4)
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