What could the opacities mean?

Definition of opacity 1a : obscurity of sense : unintelligibility. b : the quality or state of being mentally obtuse : dullness. 2 : the quality or state of a body that makes it impervious to the rays of light broadly : the relative capacity of matter to obstruct the transmission of radiant energy.

What is the example of opacity?

Opacity is defined as the quality of not letting light pass through, or hard to understand. An example of something with opacity is a darkened window. An example of opacity is the Russian language.

How do you describe opacity?

Opacity (pronounced “o-pass-ity,” not o-pace-ity”) describes how opaque an object is. An opaque object is completely impervious to light, which means you cannot see through it. For example, a car door is completely opaque. The window above the door, however, is not opaque, since you can see through it.

What does opacities in the lung mean?

Definition. Pulmonary opacity is a nonspecific term describing an area of increased pulmonary attenuation caused by an intraparenchymal process. There are various types of pulmonary opacities, easily categorized as extensive, nodular, reticular, or cystic.

What is the opposite of opacity?

clarity	translucence
transparency	cleanness

What is a 100% opacity?

100% opacity (default) means the contents of the layer are opaque. 0% opacity means completely transparent: the contents of the layer will be invisible, because they are totally transparent.

What does opacity mean in medical terms?

o·pac·i·ty (ō-pas’i-tē), 1. A lack of transparency; an opaque or nontransparent area. 2. On a radiograph, a more transparent area is interpreted as an opacity to x-rays in the body.

Which is the best synonym for the word opacity?

Opacity: the quality or state of having a veiled or uncertain meaning. Synonyms: ambiguity, ambiguousness, darkness… Antonyms: clarity, clearness, obviousness…

What are the different types of opacity monitors?

There are two types of opacity monitors; Single Pass and Double Pass. Single pass opacity monitors have a Transmitter/Receiver arrangement with the light beam emitted from the Transmitter passing across the stack to a Receiver.

What is the ASTM standard for opacity measurement?

ASTM D6216 is a consensus standard written by users and manufacturers, requiring that a monitor/analyzer must meet defined performance standards and earn a certificate of conformity. Each opacity monitor must be configured and calibrated for the specific installation where it is used.

How is the opacity of a stack gas measured?

A PM monitor measures optical characteristics of the stack gas, and uses the value to calculate the PM concentration in mg/m3. The calculation uses a calibration factor, unique to that specific installation. Opacity, in comparison, is a measure of light attenuation—the fraction of light lost in crossing the stack.