Different lengths as in respect to theelectromagnetic spectrum, measured by the metre and its derived scales. Themicrowave is in-between 1 meter to 1 millimeter.
Though for many physical quantities,SI prefixes for factors of 103—likemilli- andkilo-—are often preferred by technicians, the centimetre remains a practical unit of length for many everyday measurements; for instance,human height is commonly measured in centimetres.[2][3] A centimetre is approximately the width of the fingernail of an average adult person.
in maps, centimetres are used to make conversions from map scale to real world scale (kilometres)
to represent second moment of areas (cm4)
as the inverse of theKayser, a CGS unit, and thus a non-SI metric unit ofwavenumber: 1 kayser = 1 wave per centimetre; or, more generally, (wavenumber in kaysers) = 1/(wavelength in centimetres). The SI unit of wavenumber is the inverse metre, m−1.
