Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 43
diating a greater proportionof energy in the shorter wave lengths thanwould be emitted by a perfect radiator.Thus in spite of the fact that the tem-perature of an incandescent gas mantleis not very high (comparatively speaking)mantles of certain composition radiate alight which appears green or… … 0-5 OT. Wave length, Fio. 1.—Distribution of Energy, (1) Gas-filled lamp. (2) Sunlight.(3) Blii^ Skylight. of the sources brings the energy distribu-tion nearer to that of sunlight. Fig. 1 is founded on data quoted by Luckiesh.The curves for clear noon sunlight andblue skylight are shown and…
Lighting
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