femtometre


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Related to femtometre: Femtometers
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.femtometre - a metric unit of length equal to one quadrillionth of a meter
metric linear unit - a linear unit of distance in metric terms
micromicron, picometer, picometre - a metric unit of length equal to one trillionth of a meter
References in periodicals archive ?
While trying to improve the accuracy of measurement of a proton's radius - which had long back been pinned down at 0.877 femtometres - they found that if the electron in a hydrogen atom is replaced by its heavier cousin - the muon - the proton seems to shrink.
1 In the world of extremely small measurements, how many femtometres are there in a picometre?
20 Exactly how many femtometres are there in a millimetre?