luminosity function उदाहरण वाक्य

Given a luminosity as input, the luminosity function essentially returns the abundance of objects with that luminosity ( specifically, number density per luminosity interval ).
The number of candelas or lumens from a source also depends on its spectrum, via the nominal response of the human eye as represented in the luminosity function.
The radiometric unit watts per square metre, but with the power at each wavelength weighted according to the luminosity function, a standardized model of human visual brightness perception.
The "'luminosity function "'or "'luminous efficiency function "'describes the average spectral sensitivity of human visual perception of brightness.
This is a particular issue with the faint objects in calculating a luminosity function, as their smaller maximum volume means that a large-scale structure therein will have a large impact.

For instance, when trying to obtain a luminosity function, calibrate the Tully Fisher relation, or obtain the value of the Hubble constant, the Malmquist bias can strongly change the results.
They are based on an agreed-upon standard luminosity function which is based on measurements of the spectral characteristics of image-forming " visual photoreception " in many individual human eyes.
Like the photometric definition, it is related to the luminous flux density in a particular direction, which is radiant flux density weighted by the luminosity function ( " ? " ) of the CIE Standard Observer.
The results will also test current theories of gravity by mapping the growth of structure with redshift . Thirdly, detailed analysis of star-formation rates, environments, morphologies and luminosity functions will provide information on galaxy evolution.
The sensitivity of cones to both of the spectral colors at the opposite extremes of what the human eye can see is quite low ( see luminosity function ), so commonly observed purple colors do not achieve a high level of brightness.