Light flux density Concordance
Light flux density
Section titled “Light flux density”Concordance status: generated from processed OCR/PDF text. Treat these as source-location aids until each passage is checked against the scan.
29 hits
Total text matches across processed Steinmetz sections.
1 sources
Sources containing at least one matched alias.
4 sections
Chapters, lectures, sections, or report divisions with matches.
Matched Aliases
Section titled “Matched Aliases”Light flux density, light-flux-density
Source Distribution
Section titled “Source Distribution”| Source | Hits | Sections |
|---|---|---|
| Radiation, Light and Illumination | 29 | 4 |
Section Hits
Section titled “Section Hits”| Section | Source | Hits | Workbench | Location |
|---|---|---|---|---|
| Lecture 12: Illumination And Illuminating Engineering | Radiation, Light and Illumination | 18 | Workbench | lines 16485-17445 |
| Lecture 10: Light Flux And Distribution | Radiation, Light and Illumination | 5 | Workbench | lines 9389-12573 |
| Lecture 9: Measurement Of Light And Radiation | Radiation, Light and Illumination | 4 | Workbench | lines 8511-9388 |
| Lecture 13: Physiological Problems Of Illuminating Engineering | Radiation, Light and Illumination | 2 | Workbench | lines 17446-17956 |
Representative Source Snippets
Section titled “Representative Source Snippets”Lecture 12: Illumination And Illuminating Engineering - 18 hit(s)
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... cts clearly and comfortably when the day- light fails. The problem of artificial lighting thus comprises con- sideration of the source of light or the illuminant; the flux of light issuing from it; the distribution of the light flux in space, that is, the light flux density in space and more particularly at the illuminated objects; the illumination, that is, the light flux density reflected from the illuminated objects, and the effect produced thereby on the human eye. In the latter, we have left the field of physics and ent ...Lecture 10: Light Flux And Distribution - 5 hit(s)
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... asure. It therefore is the useful output of the illuminant, and the efficiency of an illuminant thus is the ratio of the total light flux divided by the power input. In general, the distribution of the light flux throughout space is not uniform, but the light-flux density is different in different directions from an illuminant. Unit light-flux density is the light-flux density which gives the physiological effect of one candle at unit distance. The unit of light flux, or the lumen, is the light flux passing through unit ...Lecture 9: Measurement Of Light And Radiation - 4 hit(s)
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... . 177 nometer, can be secured by using gray print on white back- ground, and lights of different colors thereby compared over a wide range of illuminations. With a luminometer chart of gray letters, of albedo a, on white background, the illumination or light flux density, at which the luminometer readings are made as described above, is: where i0 is the illumination or light flux density when using black print on white background. 81. Since light is a physiological effect, the measurement of this effect requires a ph ...Lecture 13: Physiological Problems Of Illuminating Engineering - 2 hit(s)
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... xact science, as is, for instance, apparatus design, but much further physiological investigation is needed to determine the requirements and conditions of satisfactory illumination. The physical side of illuminating engineering: — to produce a definite light flux density throughout the illuminated space, — is ah engineering problem, which can be solved with any desired degree of exactness, usually in a number of different ways. The solution of the physical problem of light distribution, however, does not yet complete the ...