Lecture 2: Relation Of Bodies To Radiation
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Radiation, Light and Illumination |
| Year | 1909 |
| Section ID | radiation-light-and-illumination-lecture-02 |
| Location | lines 1549-2365 |
| Status | candidate |
| Word Count | 5812 |
| Equation Candidates In Section | 15 |
| Figure Candidates In Section | 5 |
| Quote Candidates In Section | 1 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”LECTURE II. RELATION OF BODIES TO RADIATION. 9. For convenience, the total range of known radiations can be divided into two classes, the electric waves and the light waves, which are separated from each other by the blank space in the middle of the spectrum of radiation (Fig. 14). Under light waves we here include also the invisible ultra-red radiation and the ultra-violet radiation and the non-refrangible radiations, as X-rays, etc., separated from the latter by the second blank space of the radiation spectrum. In the following, mainly the light waves, that is, the second or high frequency range of radiation, will be discussed. The elec- tric waves are usually of importance only in their relation to the radiator or oscillator which produces them, or to the receiver on which they impinge, and thus areSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Radiation / light
Section titled “Radiation / light”LECTURE II. RELATION OF BODIES TO RADIATION. 9. For convenience, the total range of known radiations can be divided into two classes, the electric waves and the light waves, which are separated from each other by the blank space in the middle of the spectrum of radiation (Fig. 14). Under light waves we here include ...Waves / transmission lines
Section titled “Waves / transmission lines”LECTURE II. RELATION OF BODIES TO RADIATION. 9. For convenience, the total range of known radiations can be divided into two classes, the electric waves and the light waves, which are separated from each other by the blank space in the middle of the spectrum of radiation (Fig. 14). Under light waves we here include also the invisible ultra-red radiation and the ultra-violet radiation and the non-refrangible radiations, as ...Dielectricity / capacity
Section titled “Dielectricity / capacity”... ure of different and frequently of an infinite number of waves. Electric radiation usually is of a single frequency, that is, of the frequency or wave length determined by the constants of the electric circuit which produces the radiation, mainly the induct- ance L and the capacity C. They may, however, have different wave shapes, that is, comprise, in adolition to the fundamental wave, higher harmonics or multiples thereof, just as the sound waves which represent the same tone with different musical instruments are of the same frequency but of differe ...Magnetism
Section titled “Magnetism”... ectric wave is, when neglecting the energy losses in and by the con- ductor: S = -L= , (5) VLC where L is the inductance, C the capacity of the conductor per unit length (the length measured in the same measure as the speed S). The inductance L is proportional to the permeability /*, and the capacity C proportional to the dielectric constant, or specific capacity K of the medium surrounding the conductor, that is, the medium through which the electric wave propagates; that is, A V p* where A is a proportionality constant. The ratio of the speed ...Chapter-Local Concept Hits
Section titled “Chapter-Local Concept Hits”| Concept Candidate | Hits In Section | Status |
|---|---|---|
| Light | 111 | seeded |
| Radiation | 89 | seeded |
| Spectrum | 44 | seeded |
| Frequency | 20 | seeded |
| Illumination | 12 | seeded |
| Refractive index | 8 | seeded |
| Wave length | 5 | seeded |
| Magnetic permeability | 4 | seeded |
| Refraction | 4 | seeded |
| Ether | 3 | seeded |
| Velocity of light | 3 | seeded |
| Brilliancy | 2 | seeded |
Chapter-Local Glossary Hits
Section titled “Chapter-Local Glossary Hits”| Term Candidate | Hits In Section | Status |
|---|---|---|
| ultra-violet | 7 | seeded |
| ultra-red | 6 | seeded |
| wave length | 5 | seeded |
| ether | 3 | seeded |
| brilliancy | 2 | seeded |
| electric waves | 2 | seeded |
Equation Candidates
Section titled “Equation Candidates”| Candidate ID | OCR / PDF-Text Candidate | Source Location |
|---|---|---|
radiation-light-and-illumination-eq-candidate-0058 | The velocity of light in empty space is 3 X 1010 cm. per sec. | line 1634 |
radiation-light-and-illumination-eq-candidate-0059 | Let then Sl = speed of propagation in medium A, S2 = speed of | line 1657 |
radiation-light-and-illumination-eq-candidate-0060 | medium TF, only the distance CK = — 2 GH, and the wave front | line 1674 |
radiation-light-and-illumination-eq-candidate-0061 | and a2 = angle of refraction, that is, the angle between the out- | line 1690 |
radiation-light-and-illumination-eq-candidate-0062 | FDH = a, and LHD = a2 ; | line 1694 |
radiation-light-and-illumination-eq-candidate-0063 | FH = DH sin a, and DL = DH sin av (1) | line 1697 |
radiation-light-and-illumination-eq-candidate-0064 | FH + DL = S, - S3; (2) | line 1703 |
radiation-light-and-illumination-eq-candidate-0065 | sin «1 Sl | line 1708 |
Figure Candidates
Section titled “Figure Candidates”| Candidate ID | OCR / PDF-Text Candidate | Source Location |
|---|---|---|
radiation-light-and-illumination-fig-015 | 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… | line 1654 |
radiation-light-and-illumination-fig-016 | 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… | line 1819 |
radiation-light-and-illumination-fig-017 | VIOLET FIG. 17. a number of very faint red and orange lines, of which three are indicated dotted in Fig. 17. | line 1885 |
radiation-light-and-illumination-fig-018 | perature rise, their brilliancy is greatly increased. FIG. 18. Combinations of the different types of spectra: continuous spectrum, line spectrum, band spectrum, reversed spectrum, | line 1974 |
radiation-light-and-illumination-fig-019 | 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 ir… | line 2013 |
Hidden-Gem Quote Candidates
Section titled “Hidden-Gem Quote Candidates”| Candidate ID | Candidate Passage | Source Location |
|---|---|---|
radiation-light-and-illumination-quote-electric-waves-and-light-1553 | line 1553 |
Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Radiation / light: Compare the chapter’s radiation vocabulary with modern electromagnetic radiation, spectral frequency, wavelength, absorption, and illumination engineering.
- Waves / transmission lines: Map Steinmetz’s wave and line language onto modern distributed constants, propagation velocity, standing waves, and reflections.
- Dielectricity / capacity: Check whether the passage treats capacity, condensers, displacement, or dielectric stress as field storage rather than only circuit algebra.
- Magnetism: Track flux, reluctance, permeability, magnetizing force, and loss language against modern magnetic-circuit terminology.
- Ether references: Verify exact wording before drawing conclusions. Ether language must be separated from later interpretive systems.
Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- Radiation / light: Radiation and wave language can invite ether-field comparison, but source wording, modern radiation theory, and speculative synthesis must stay separated.
- Waves / transmission lines: Standing/traveling wave passages may support richer field interpretations; the page keeps those readings separate from verified Steinmetz wording.
- Dielectricity / capacity: A Wheeler-style reading may emphasize dielectric compression, field stress, and stored potential, but this page treats that as interpretation unless Steinmetz explicitly says it.
- Magnetism: Centrifugal/divergent magnetic-field readings are interpretive overlays, not automatic historical claims.
- Ether references: If Steinmetz mentions ether, quote only the verified source words first; any broader ether-field synthesis belongs in a labeled interpretive layer.
Promotion Checklist
Section titled “Promotion Checklist”- Open the full source text and the scan or raw PDF.
- Verify the chapter boundary and surrounding context.
- Promote exact quotations only after checking the source image.
- Move mathematical candidates into canonical equation pages only after formula typography is corrected.
- Move diagram candidates into the diagram archive only after image extraction, crop verification, and manifest creation.
- Keep Steinmetz wording, modern translation, and ether-field interpretation in separate labeled layers.