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If my source is at a slightly different wavelength from the standard calibration wavelength, doesn that add to measurement error?

April 26, 2017calibration different Error measurement slightly source standard

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If my source is at a slightly different wavelength from the standard calibration wavelength, doesn that add to measurement error?

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Perhaps, but the wavelength of most sources is not known by the person making the measurement. If everyone uses meters calibrated at only a few specific wavelengths, everyone can be testing to the same standard and will get more closely correlated mesurements on sources of unknown wavelengths .