wavenumber, σ^ reciprocal centimetre cm–^1
wavelength, λ metre m centimetre cm
millimetre mm millimetre mm
micrometre μm micron μ
nanometre nm millimicron mμ
Ångström Å
magnetic flux density, B tesla T gauss G
disintegration rate curie Ci curie Ci
becquerel Bq
nuclear cross-sectional area barn b barn b