Opacity definition

Opacity means the degree to which emissions reduce the transmission of light and obscure the view of an object in the background.

Opacity means the degree to which an object seen through a plume is obscured, stated as a percentage.

Opacity means that property of a substance tending to obscure vision and is measured as percent obscuration.

Examples of Opacity in a sentence

• Opacity ensures benefit to those who monopolize scarce economic resources.

• Opacity shall not exceed sixty percent (60%) for more than a cumulative total of fifteen (15) minutes (sixty (60) readings as measured according to 40 CFR 60, Appendix A, Method 9 or fifteen (15) one (1) minute nonoverlapping integrated averages for a continuous opacity monitor) in a six (6) hour period.

• Opacity refers to the degree to which printing on one side of the paper shows through to the other side.

• Opacity sources are discussed in the next section.The geometric albedo spectra are then computed following the approach employed by McKay et al.

• Opacity shall not exceed an average of thirty percent (30%) in any one (1) six (6) minute averaging period as determined in 326 IAC 5-1-4.

More Definitions of Opacity

Opacity means the capacity to obstruct the transmission of light, expressed as percent.

Opacity means a state which renders material partially or wholly impervious to rays of light and causes obstruction of an observer's view.

Opacity means an optical measurement of the density of particulate matter in the exhaust flow of an engine, expressed in m-1;

Opacity means the percentage of light obstructed from passage through an exhaust smoke plume.

Opacity means the fraction of a beam of light, expressed in percent, which fails to penetrate a plume of smoke.

Opacity means that condition which renders material partially or wholly impervious to rays of light and causes a degree of obstruction to an observer's view.

Opacity means the degree to which emissions, excluding uncombined water, reduce the transmission of light and obscure the view of an object in the background as measured by EPA Method 9 or other method, as specified in each applicable rule.