Illumination Engineering

Visual topic gallery

Illumination Engineering

Visual routes through light flux, photometry, distribution curves, inverse-square reasoning, physiological visibility, and lighting practice.

2

modern guide diagrams

reconstructions, not historical evidence

107

figure candidates

OCR/PDF-text leads needing crop review

327

formula candidates

math leads needing transcription review

1

source routes

source text, workbench, visual and formula maps

Layer rule: original crops, figure candidates, modern redraws, and formula candidates are separated. Use this page to browse visually, then verify in the linked source text and workbench.

Source Routes

Radiation Light And Illumination Visual mapRadiation Light And Illumination Formula map

Modern Guide Diagrams

Spectrum Of Radiation

Modern navigation guide for Steinmetz’s electric-wave, visible-light, ultraviolet, and X-ray spectrum bridge.

radiation, electric-waves, frequency, spectrum, ether

Open SVG - all recreated visuals

Illumination Inverse-Square Geometry

Modern guide for the practical bridge from radiation to visual illumination and light distribution.

illumination, radiation, light-flux, inverse-square

Open SVG - all recreated visuals

Candidate Figure Leads

Candidate	Caption lead	Source section	Routes
radiation-light-and-illumination-fig-001 Fig. 1	tion, the time at which the moon M should disappear from sight, FIG. 1. when seen from the earth E, by passing behind Jupiter, 7 (Fig. 1), could be exactly calculated. It was found, however, that some-	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-fig-002 Fig. 2	5_MOE_S FIG. 2. direction the light reappears. If the disk is slowly revolved, alter- nate light and darkness will be observed, but when the speed in-	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-fig-003 Fig. 3	from the upper surface of the plain glass plate A. A beam of FIG. 3. reflected light a, thus is a combination of a beam b and a beam c.	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-fig-004 Fig. 4	glass plates. At those points dv dv etc. at which the distance FIG. 4. between the two glass plates is J wave length, or j, J, etc., the	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-fig-005 Fig. 5	etc. in the plane of the paper, and thus perpendicular to the ray FIG. 5. of light. In the former case (a longitudinal vibration, as sound) there obviously can be no difference between the directions at	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-fig-009 Fig. 9	it to you, by bringing the rods near to this Crookes’ radiometer, FIG. 9. which is an instrument showing the energy of radiation. It con- sists (Fig. 10) of four aluminum vanes, mounted in a moderately	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-fig-010 Fig. 10	(red, orange and yellow) with increase in temperature, the light FIG. 10. 12	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-fig-011 Fig. 11	of the lower frequencies of visible radiation, red or orange. FIG. 11. In the tungsten lamp at high brilliancy and more still in the	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-fig-012 Fig. 12	They are used in wireless telegraphy, etc. I here connect (Fig. 12) FIG. 12. the condenser C of the apparatus which I used for operating the ultra-violet arc, to a spark gap Gv of which the one side is con-	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-fig-013 Fig. 13	o — ^^ — o FIG. 13. has been measured by Herz by producing standing waves by combination of main wave and reflected wave.	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-fig-014 Fig. 14	as far as possible when producing light, as they consume power FIG. 14. and so lower the efficiency; the ultra-violet rays are of importance in medicine as germ killers. They are more or less destructive	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-fig-015 Fig. 15	edge of the beam reaches the boundary at D its speed changes FIG. 15. by entering the medium W — decreases in the present instance. Let then Sl = speed of propagation in medium A, S2 = speed of	Radiation, Light and Illumination Lecture 2: Relation Of Bodies To Radiation	source workbench
radiation-light-and-illumination-fig-016 Fig. 16	medium into another, and the higher frequencies are deflected FIG. 16. more than the lower frequencies, thus showing that the velocity of propagation decreases with an increase of frequency, that is,	Radiation, Light and Illumination Lecture 2: Relation Of Bodies To Radiation	source workbench
radiation-light-and-illumination-fig-017 Fig. 17	VIOLET FIG. 17. a number of very faint red and orange lines, of which three are indicated dotted in Fig. 17.	Radiation, Light and Illumination Lecture 2: Relation Of Bodies To Radiation	source workbench
radiation-light-and-illumination-fig-018 Fig. 18	perature rise, their brilliancy is greatly increased. FIG. 18. Combinations of the different types of spectra: continuous spectrum, line spectrum, band spectrum, reversed spectrum,	Radiation, Light and Illumination Lecture 2: Relation Of Bodies To Radiation	source workbench
radiation-light-and-illumination-fig-019 Fig. 19	and the body thus acts as a mirror, that is, gives a virtual image FIG. 19. back of it as shown in dotted line in Fig. 18. In the latter case (Fig. 19) the light is reflected irregularly in all directions.	Radiation, Light and Illumination Lecture 2: Relation Of Bodies To Radiation	source workbench
radiation-light-and-illumination-fig-021 Fig. 21	VIOLET FIG. 21. in the ultra-red and ultra-violet, where no power of radiation can produce visibility. It thus varies about as indicated in Fig. 22.	Radiation, Light and Illumination Lecture 3: Physiological Effects Of Radiation	source workbench
radiation-light-and-illumination-fig-022 Fig. 22	the basis of equal ease in distinguishing objects. As the pur- FIG. 22. pose for which light is used is to distinguish objects, the correct comparison of lights obviously is on the basis of equal distinctness	Radiation, Light and Illumination Lecture 3: Physiological Effects Of Radiation	source workbench
radiation-light-and-illumination-fig-023 Fig. 23	v FIG. 23. meter candles (or rather log i) as abscissas, for red light, wave length 65.0; orange yellow light, wave length 59; bluish green	Radiation, Light and Illumination Lecture 3: Physiological Effects Of Radiation	source workbench
radiation-light-and-illumination-fig-024 Fig. 24	\ FIG. 24. (1 meter-candle is the illumination produced by 1 candle power	Radiation, Light and Illumination Lecture 3: Physiological Effects Of Radiation	source workbench
radiation-light-and-illumination-fig-025 Fig. 25	S FIG. 25. 62 for high intensities and changes in approximately the same range of intensities in which lwo changes; ks is also plotted in	Radiation, Light and Illumination Lecture 3: Physiological Effects Of Radiation	source workbench
radiation-light-and-illumination-fig-026 Fig. 26	YELLOW GREEN FIG. 26. carbon filament would be somewhat like C. That is, the physio-	Radiation, Light and Illumination Lecture 3: Physiological Effects Of Radiation	source workbench
radiation-light-and-illumination-fig-027 Fig. 27	fore, increase enormously with the increase of temperature. FIG. 27. With bodies in a vacuum, the radiation power is the power input and this above law can be used to calculate the tempera-	Radiation, Light and Illumination Lecture 5: Temperature Radiation	source workbench
radiation-light-and-illumination-fig-028 Fig. 28	weight, exhibit a periodicity in their properties which permits FIG. 28. a systematic study of their properties. In diagram Fig. 28 the	Radiation, Light and Illumination Lecture 5: Temperature Radiation	source workbench

Formula Leads That Pair With The Visual Topic

Candidate	OCR/PDF text	Source section	Routes
general-lectures-electrical-engineering-eq-candidate-0026 symbolic-ac	copper of No. 5, or j of ;j = ^: Cu. = ^	General Lectures on Electrical Engineering Lecture 3: Light And Power Distribution	source workbench
radiation-light-and-illumination-eq-candidate-0063 symbolic-ac	FH = DH sin a, and DL = DH sin av (1)	Radiation, Light and Illumination Lecture 2: Relation Of Bodies To Radiation	source workbench
radiation-light-and-illumination-eq-candidate-0198 symbolic-ac	cubic hyperbolas: e^i = kz2; or, el =- £j and since we find for	Radiation, Light and Illumination Lecture 8: Arc Lamps And Arc Lighting	source workbench
radiation-light-and-illumination-eq-candidate-0235 waves-radiation	pi = 6li = kli, (7)	Radiation, Light and Illumination Lecture 8: Arc Lamps And Arc Lighting	source workbench
radiation-light-and-illumination-eq-candidate-0300 symbolic-ac	fc1 = 2 TT / sin <t>dfa (3)	Radiation, Light and Illumination Lecture 10: Light Flux And Distribution	source workbench
radiation-light-and-illumination-eq-candidate-0281 waves-radiation	L -T- S = x2 -T- 7/2, where x and y are the two distances of the	Radiation, Light and Illumination Lecture 9: Measurement Of Light And Radiation	source workbench
radiation-light-and-illumination-eq-candidate-0178 symbolic-ac	J in. or less diameter, even acetylene, a = 1, gives smokeless	Radiation, Light and Illumination Lecture 7: Flames As Illuminants	source workbench
radiation-light-and-illumination-eq-candidate-0296 symbolic-ac	dA = 2 n sin	Radiation, Light and Illumination Lecture 10: Light Flux And Distribution	source workbench
radiation-light-and-illumination-eq-candidate-0014 waves-radiation	lw = 60 microcentimeters,* that is, 60 X 10~8 cm. (or about	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-eq-candidate-0015 waves-radiation	^<y^<5-<y in.) and since the speed is S = 3 X 1010 cm. the frequency	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-eq-candidate-0019 waves-radiation	motions of very high speed, S = 3 X 1010 cm. per sec. in a hypo-	Radiation, Light and Illumination Lecture 1: Nature And Different Forms Of Radiation	source workbench
radiation-light-and-illumination-eq-candidate-0060 waves-radiation	medium TF, only the distance CK = - 2 GH, and the wave front	Radiation, Light and Illumination Lecture 2: Relation Of Bodies To Radiation	source workbench
radiation-light-and-illumination-eq-candidate-0061 waves-radiation	and a2 = angle of refraction, that is, the angle between the out-	Radiation, Light and Illumination Lecture 2: Relation Of Bodies To Radiation	source workbench
radiation-light-and-illumination-eq-candidate-0064 waves-radiation	FH + DL = S, - S3; (2)	Radiation, Light and Illumination Lecture 2: Relation Of Bodies To Radiation	source workbench
radiation-light-and-illumination-eq-candidate-0068 waves-radiation	S = -L= , (5)	Radiation, Light and Illumination Lecture 2: Relation Of Bodies To Radiation	source workbench
radiation-light-and-illumination-eq-candidate-0070 waves-radiation	Vl = d*-, (9)	Radiation, Light and Illumination Lecture 2: Relation Of Bodies To Radiation	source workbench
radiation-light-and-illumination-eq-candidate-0071 waves-radiation	Since for most media the permeability /JL = 1, for all except	Radiation, Light and Illumination Lecture 2: Relation Of Bodies To Radiation	source workbench
radiation-light-and-illumination-eq-candidate-0089 waves-radiation	Z0 = 51.1, bluish green for very low intensity, curve (a).	Radiation, Light and Illumination Lecture 3: Physiological Effects Of Radiation	source workbench

Editorial Use

This gallery is meant for discovery, not final citation. The strongest current source distribution is: Radiation, Light and Illumination (398), General Lectures on Electrical Engineering (22), Theory and Calculation of Transient Electric Phenomena and Oscillations (4), Theory and Calculation of Electric Circuits (3). Promote a diagram or formula only after the scan, page label, exact caption, and mathematical notation are checked.