Half a nanometre is one possible answer.
Actually, a picometre is the next prefixed value and it is a thousandth of a nanometre. There are further prefices.
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Of course there are. How else would you measure things smaller than a millimeter? There are Micrometers, nanometers, angstroms and picometers
nanometer is smaller as it is 0.000000001 whereas micrometer is 0.000001
1,935,480,000 nanometers
1 nanometre.1 nanometre.1 nanometre.1 nanometre.
No. 1 kilometer has 1,000,000,000,000 nanometers in it,which is larger than one nanometer.