Emissivity of straight and helical filaments of tungsten (1918)
National Bureau of Standards · leaf 19
cardboard, which were adjustable andwhich had sharp beveled edges. By means of an adjusting screwa uniformly illuminated image of a small portion of the inside oroutside of the turn (shown diagrammatically by the dark rectan-gles in Fig. 2 (section .4; also Fig. i) could be projected upon… … Fig. 4.—Distribution of energy radiated from the inside, I, and outside, O, of an incan-descent helical filament of tungsten turn. Similarly, curve 0 gives the energy distribution of theradiation from the outside of the turn of the helical filament ofthe tungsten. In the latter the ordinates wrere…
Rays and radiation · Lamps and lighting · Heat flow, thermal and thermodynamic processes
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