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Coefficient of haze

The coefficient of haze (also known as smoke shade) is a measurement of visibility interference in the atmosphere.

One way to measure this is to draw about 1000 cubic feet of air sample through an air filter and obtain the radiation intensity through the filter. The coefficient is then calculated based on the absorbance formula

:COH = -100 \log_{10} \left ( \frac{I_1}{I_0} \right )

where I_1 is the radiation (400 nm light) intensity transmitted through the sampled filter, and I_0 is the radiation intensity transmitted through a clean (control) filter.

References

{{cite encyclopaedia|encyclopedia=Dictionary of agricultural and allied sciences: (P), Part 7|author=L. L. Somani|publisher=Mittal Publications|date=1992|isbn=9788170991137|article=Coefficient of Haze|pages=322}}

{{Cite web |last=Chemistry (IUPAC) |first=The International Union of Pure and Applied |title=IUPAC - coefficient of haze (C01125) |url=https://goldbook.iupac.org/terms/view/C01125 |access-date=2025-05-08 |website=goldbook.iupac.org |language=en |doi=10.1351/goldbook.c01125 |doi-access=free}}

Further reading

  • {{cite encyclopaedia|encyclopedia=IUPAC Compendium of Chemical Terminology|edition=2nd|date=1997|article=Coefficient of Haze|publisher=International Union of Pure and Applied Chemistry|url=http://goldbook.iupac.org/PDF/C01125.pdf|author=Alan D. McNaught and Andrew Wilkinson|isbn=978-0-86542-684-9}}
  • {{cite book|title=Methods of air sampling and analysis|author=James P. Lodge|edition=3rd|publisher=CRC Press|year=1988|isbn=9780873711418|chapter=Continuous Tape Sampling of Coefficient of Haze}}

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Category:Visibility

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