Optical beam smoke detectors work on the principle of light obscuration, where the presence of smoke blocks some of the light from the beam, typically through either absorbance or light scattering.
32.
Modeling the light distribution of the unaffected parts of a galaxy, and subtracting from it the detected light distribution, they derived the amount of light missing because of the dust obscuration.
33.
In an asymmetrical Cassegrain, the mirror ( s ) may be tilted to avoid obscuration of the primary or to avoid the need for a hole in the primary mirror ( or both ).
34.
Tests One and Two were fully instrumented with a high sensor density, including measurements of temperature, incident heat, gas velocities, smoke obscuration, wall temperature and structure deflection, among others.
35.
;United States : The height above the Earth's surface of the lowest layer of clouds or obscuring phenomena that is reported as broken, overcast, or obscuration, and not classified as thin or partial.
36.
This measure should not be confused with the obscuration of the eclipse, which is the area fraction of the eclipsed body occulted by the eclipsing body, whereas the magnitude of an eclipse is strictly a ratio of diameters.
37.
The time of obscuration directly relates to the particle's Diameter, by a simple calculation principle of multiplying the known beam rotation Velocity in the directly measured Time of obscuration, ( D = V * t ).
38.
The time of obscuration directly relates to the particle's Diameter, by a simple calculation principle of multiplying the known beam rotation Velocity in the directly measured Time of obscuration, ( D = V * t ).
39.
The term includes not only ignorance out of darkness, but also obscuration, misconceptions, mistaking illusion to be reality or impermanent to be permanent or suffering to be bliss or non-self to be self ( delusions ).
40.
A range of passive protection and defensive aids are also available, these being integrated into the Lance turret when fitted, and including the Rapid Obscuration System Land, a laser warning system and an acoustic shot locator system.
