{"tema_id":"1819","string":"spectral width at half maximum value           #01860","created":"2022-12-19 09:13:39","code":null,"notes":[{"@type":"Scope note","@lang":"en-EN","@value":"1. The coherent SI unit is the metre (m), but often the nanometre (nm) is used. 2. The optical quantity can be e.g. radiant luminous flux, absorbance, etc. "},{"@type":"Cataloger's note","@lang":"en-EN","@value":"reference: R135:2004 2.21 "},{"@type":"Cataloger's note","@lang":"en-EN","@value":"ID: 01860 "},{"@type":"Definition note","@lang":"en-EN","@value":"difference between a higher and lower wavelength value at which the value of an optical quantity is reduced to half of its maximum value between the two wavelengths "}]}