the uncertanity in position for an elactron is lambda /4™ lamda de broglies wavelength .The uncertainity in the velocity will be
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Geometrically the square root of 2 is the length of a diagonal across a square with sides of one unit of length; this follows the Pythagorean theorem. It was probably the first number known to be irrational.[citation needed]
As a good rational approximation for the square root of two, with a reasonably small denominator, the fraction 99/70 (≈ 1.4142857) is same.
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