It is
significantly measurable (of the order of the atomic-planes spacing
in crystals) only in case of sub-atomic particles like electrons,
protons, etc (due to smallness of their masses and hence, momenta) However, it is indeed very small, quite beyond measurement, in case
of macroscopic objects, commonly  encountered in everyday life Rationalised 2023-24
Physics
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POINTS TO PONDER
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