where 0.2 is the uncertainty in this case. [P1.1, P1.2]
in: the value of a physical quantity
is: a quantitative indication of the lack of precision and/or accuracy in the value of the physical quantity. [P1.1, P1.2]
may be shown explicitly: by writing the quantity in a form such as where 0.2 is the uncertainty in this case. [P1.1, P1.2]
by default is implied: by the number of significant figures in the quoted value. [P1.1, P1.2]
See random error and systematic error.
See also Heisenberg uncertainty principle for a fundamental limitation.
in an experiment, may be known as: error.
Copyright 1997, The Open University