A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 226
ed as a standard in theirphotometry, gives just ten times the quantity of light given by this standardcandle. An ordinary gas-burner consuming five feet of gas hourly gives a lightequivalent to from twelve to fifteen standard candles. INTENSITY OF THE SUNS LUMINOSITY. 213 the mirror and the lens, a… … ^m:^ Fig. 118. — Comparison of Sunlight with a Standard Candle. pencil, one formed by the candle, and the other by the light from the lens.are equally dark. It will be found that the candle has to be put at a dis-tance of about one metre from the screen; though the results would vary agood deal…
Astronomy
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