Lecture 13: Physiological Problems Of Illuminating Engineering

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Source Metadata

Field	Value
Source	Radiation, Light and Illumination
Year	1909
Section ID	`radiation-light-and-illumination-lecture-13`
Location	lines 17446-17956
Status	candidate
Word Count	3965
Equation Candidates In Section	0
Figure Candidates In Section	6
Quote Candidates In Section	0

Radiation / light: 228 Magnetism: 33 Field language: 7

Opening Source Excerpt

LECTURE XIII. PHYSIOLOGICAL PROBLEMS OF ILLUMINATING ENGINEERING. 123. The design of an illumination requires the solution of physiological as well as physical problems. Physical considera- tions, for instance, are the distribution of light-flux intensity throughout the illuminated space, as related to size, location and number of light sources, while the relation, to the satisfac- tory character of the illumination, of the direction of the light, its subdivision and diffusion, etc., are physiological questions. Very little, however, is known on the latter, although the entire field of the physiological effects of the physical methods of illumination is still largely unexplored. As result thereof, illuminating engineering is not yet an exact 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

Source-Located Theme Snippets

Radiation / light

LECTURE XIII. PHYSIOLOGICAL PROBLEMS OF ILLUMINATING ENGINEERING. 123. The design of an illumination requires the solution of physiological as well as physical problems. Physical considera- tions, for instance, are the distribution of light-flux intensity throughout the illuminated space, as related to size, location and number of light sources, while the relation, to the s ...

Magnetism

LECTURE XIII. PHYSIOLOGICAL PROBLEMS OF ILLUMINATING ENGINEERING. 123. The design of an illumination requires the solution of physiological as well as physical problems. Physical considera- tions, for instance, are the distribution of light-flux intensity throughout the illuminated space, as related to size, location and number of light sources, while the relation, to the satisfac- tory character of the illumination, of the direction of the light, its subdivision and diffusion, etc., are physiological questions. Ve ...

Field language

... location and number of light sources, while the relation, to the satisfac- tory character of the illumination, of the direction of the light, its subdivision and diffusion, etc., are physiological questions. Very little, however, is known on the latter, although the entire field of the physiological effects of the physical methods of illumination is still largely unexplored. As result thereof, illuminating engineering is not yet an exact science, as is, for instance, apparatus design, but much further physiological investigation is needed to determi ...

Chapter-Local Concept Hits

Concept Candidate	Hits In Section	Status
Light	146	seeded
Illumination	76	seeded
Brilliancy	8	seeded
Radiation	6	seeded
Light flux density	2	seeded

Chapter-Local Glossary Hits

Term Candidate	Hits In Section	Status
brilliancy	8	seeded
light flux density	2	seeded

Equation Candidates

Candidate ID	OCR / PDF-Text Candidate	Source Location
No chapter-local candidates yet	-	-

Figure Candidates

Candidate ID	OCR / PDF-Text Candidate	Source Location
`radiation-light-and-illumination-fig-122`	M/w///^^^^^ FIG. 122. face of the ground and A a flat circular shade at distance I above the ground, the intensity distribution of the light in plane P is as	line 17594
`radiation-light-and-illumination-fig-123`	from directed to diffused light. Thus, no sharp dividing line FIG. 123. PHYSIOLOGICAL PROBLEMS. 281	line 17626
`radiation-light-and-illumination-fig-124`	combining A and B by the parallelogram law. FIG. 124. FIG. 125.	line 17831
`radiation-light-and-illumination-fig-125`	FIG. 124. FIG. 125. In some respects the action of the two separate flux densities	line 17834
`radiation-light-and-illumination-fig-126`	nator mn. The actual illumination as shown in Fig. 127 gives a FIG. 126. FIG. 127.	line 17879
`radiation-light-and-illumination-fig-127`	FIG. 126. FIG. 127. black segment of angle <D, while more than half the circumference	line 17882

Hidden-Gem Quote Candidates

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Modern Engineering Reading Prompts

Radiation / light: Compare the chapter’s radiation vocabulary with modern electromagnetic radiation, spectral frequency, wavelength, absorption, and illumination engineering.
Magnetism: Track flux, reluctance, permeability, magnetizing force, and loss language against modern magnetic-circuit terminology.
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Magnetism: Centrifugal/divergent magnetic-field readings are interpretive overlays, not automatic historical claims.
Field language: Field-pressure or field-gradient interpretations can be explored here only after the explicit source passage and modern engineering translation are kept distinct.

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