Luminous density

Light. Light level, or illuminance, is usually measured with a photocell made from a semiconductor such as silicon. Such photocells produce an output current proportional to the illumination on the sensor incident luminous density. 

This last usage has given rise to a number of specitic applications of the term density, Thus, the luminous density is the luminous energy found in a unit volume of space The specular density is the logarithm of the reciprocal of the specular transmittance, and so on. 

Table 6.23 indicates a certain disadvantage of luminaires in e lamps with high luminous densities, with high rated power and luminous flux values or with high luminous efficiency do not comply with the e-standards IEC 60079-7 and EN 50019. Incandescent lamps and blended lamps have become... 

No. Type of lamp Rated power W Luminous flux lm Luminous efficiency lm/W Luminous density cd/cm2 Colour rendering property Additional sets... 

Jones, L. A., and Condit, H. R., Sunlight and skylight as determinants of photographic exposure. I. Luminous density as determined by solar altitude and atmospheric conditions. 

ISO 9241-305 2008 ergonomics of human-system interaction—part 305 optical laboratory test methods for electronic visual displays Determination of the reflected light, luminous density measurement... 

Luminous density w, (wj W = dQjdV lumen-second per cubic meter Im-S m" ... 

The number of lumens indicates the total amount of power but gives no indication of the density" of that power. This last measure is given by the luminous intensity ... 

Luminance is the luminous intensity divided by the area of emission of light (Iumens/steradian/m2). This is the power density emitted per unit area. 

Figure 16-42. Semi log ploi of current density (0) and luminance (O) of an ITO/Oocl-OPV5 (ISO nm)/Oocl-OPV5-CN" (45 nm)/AI double-layer device as a function of bias voltage. Inset double-layer electroluminescence spectrum.

Because the amounts and density of these transporters vary along the gastrointestinal tract, it is necessary to introduce a correction factor for the varying transport rates in the different luminal and enterocyte compartments. Due to the lack of experimental data for the regional distribution, and Michaelis-Menten constants for each drug in Table 18.2, we fitted an intrinsic (concentration-independent) transport rate for each drug to closely approximate the experimental %HIA. This... 

Fig-1. The density of bacteria along the gastrointestinal tract of man is shown schematically based on data from references 1-5 in the text. Density is given by logio CFU/ml of luminal contents in the fasting state. TBC = Total bacterial count. 

Spergel et al. 2007), but greatly exceeds the smoothed-out cosmological density of luminous matter deduced from galaxy redshift surveys, which give a luminosity density in blue light... 

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