Lecture 5: Temperature 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-05 |
| Location | lines 3946-5076 |
| Status | candidate |
| Word Count | 8675 |
| Equation Candidates In Section | 34 |
| Figure Candidates In Section | 4 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”LECTURE V. TEMPERATURE RADIATION. 34. The most common method of producing radiation is by impressing heat energy upon a body and thereby raising its tem- perature. Up to a short time ago this was the only method avail- able for the production of artificial light. The temperature is raised by heating a body by the transformation of chemical energy, that is, by combustion, and in later years by the trans- formation of electric energy, as in the arc and incandescent lamp. With increasing temperature of a body the radiation from the body increases. Thus, also, the power which is required to main- tain the body at constant temperature increases with increase of temperature. In a vacuum (as approximately in the incandes- cent lamp) , where heat conduction and heat convection from the radiating body isSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Radiation / light
Section titled “Radiation / light”LECTURE V. TEMPERATURE RADIATION. 34. The most common method of producing radiation is by impressing heat energy upon a body and thereby raising its tem- perature. Up to a short time ago this was the only method avail- able for the production of artificial light. The temperature is raised by heating a bod ...Ether references
Section titled “Ether references”... rresponding to a specific consumption of 2.5 to 2.6 watts per candle power, with very little blackening. These metal- lized carbon filament lamps exhibit characteristics similar to the metal filament lamps; their life is largely limited by breakage and not by blackening. Whether hereby the possibilities of carbon are exhausted or still more stable forms of carbon will be found, which permit raising the filament temperature as near to the boiling point of carbon as the temperature of the wolfram filament is to its melt- ing point * and thereby reach ...Waves / transmission lines
Section titled “Waves / transmission lines”... on give the same radiation curve; that is, the same distribution of intensity as function of the frequency and thus the same fraction of visible to total radia- tion, that is, the same efficiency of light production. If T is the absolute temperature in deg. cent, and lw the wave length of radiation, the power radiated at wave length /„, and temperature T1 by normal temperature radiation is : b P (IJ = c,Alw % ^ , (Wien's law) ; or' r • i. * r1 P (U = c,Alw a\e V-l\ (Planck's law) ; TEMPERATURE RADIATION. 75 where a = 5 for normal temperatu ...Chapter-Local Concept Hits
Section titled “Chapter-Local Concept Hits”| Concept Candidate | Hits In Section | Status |
|---|---|---|
| Radiation | 233 | seeded |
| Light | 61 | seeded |
| Frequency | 23 | seeded |
| Luminescence | 17 | seeded |
| Illumination | 11 | seeded |
| Ether | 5 | seeded |
| Spectrum | 5 | seeded |
| Arc lamp | 4 | seeded |
| Wave length | 2 | seeded |
| Brilliancy | 1 | seeded |
Chapter-Local Glossary Hits
Section titled “Chapter-Local Glossary Hits”| Term Candidate | Hits In Section | Status |
|---|---|---|
| candle-power | 9 | seeded |
| ether | 5 | seeded |
| ultra-violet | 2 | seeded |
| wave length | 2 | seeded |
| brilliancy | 1 | seeded |
| ultra-red | 1 | seeded |
Equation Candidates
Section titled “Equation Candidates”| Candidate ID | OCR / PDF-Text Candidate | Source Location |
|---|---|---|
radiation-light-and-illumination-eq-candidate-0103 | tor and T2 = absolute temperature of the surrounding objects | line 3972 |
radiation-light-and-illumination-eq-candidate-0104 | Pr = kA (TV - ?V), (1) | line 3976 |
radiation-light-and-illumination-eq-candidate-0105 | k = 5 X 1(T12; (2) | line 3981 |
radiation-light-and-illumination-eq-candidate-0106 | Pr = kA (T, - T2) (TV + T*T2 + 7\7y + 7y); | line 3997 |
radiation-light-and-illumination-eq-candidate-0107 | Pr = 4 kAT* (T, - T), (3) | line 4000 |
radiation-light-and-illumination-eq-candidate-0108 | temperature rise, as long as the latter is moderate, equation (3) | line 4013 |
radiation-light-and-illumination-eq-candidate-0109 | stationary air A^ reaches values as high as fct = 25 X 10~12 to | line 4016 |
radiation-light-and-illumination-eq-candidate-0110 | 50 X 10~12. | line 4017 |
Figure Candidates
Section titled “Figure Candidates”| Candidate ID | OCR / PDF-Text Candidate | Source Location |
|---|---|---|
radiation-light-and-illumination-fig-027 | 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… | line 4062 |
radiation-light-and-illumination-fig-028 | weight, exhibit a periodicity in their properties which permits FIG. 28. a systematic study of their properties. In diagram Fig. 28 the | line 4310 |
radiation-light-and-illumination-fig-029 | \ FIG. 29. power required to maintain the temperature is correspondingly less, hence the efficiency is the same and merely a larger radiator | line 4741 |
radiation-light-and-illumination-fig-030 | where colored radiation or luminescence is present. Thus the FIG. 30. radiation given by the interior of a closed body of uniform tem- perature ceases to be black body radiation… | line 4923 |
Hidden-Gem Quote Candidates
Section titled “Hidden-Gem Quote Candidates”| Candidate ID | Candidate Passage | Source Location |
|---|---|---|
| No chapter-local candidates yet | - | - |
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.
- Ether references: Verify exact wording before drawing conclusions. Ether language must be separated from later interpretive systems.
- Waves / transmission lines: Map Steinmetz’s wave and line language onto modern distributed constants, propagation velocity, standing waves, and reflections.
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.
- Ether references: If Steinmetz mentions ether, quote only the verified source words first; any broader ether-field synthesis belongs in a labeled interpretive layer.
- Waves / transmission lines: Standing/traveling wave passages may support richer field interpretations; the page keeps those readings separate from verified Steinmetz wording.
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.