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|  | | Optical transmission
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|  | | |  The optical properties of bulk substances is often quoted as "n" and "k" values, which are the real and imaginary parts of refractivity, respectively. "k" relates to optical absorption, and this calc determines the transmission of a sample.
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| | |  It is important to know that the "k" values of substances are strongly wavelength-dependent, so it must be known for the specific wavelength of interest in order for the calculation to be accurate.
k values range over several orders of magnitude, from 0.00001 (and less) for highly transparent materials to approaching 1 for very opaque materials. | | ||||||
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© Andy & Steve Shipway 2008