Baly, E. C. C. (Edward Charles Cyril), b. 1871 · London, Longmans, Green · leaf 333
to give a steady light, when thetemperature was kept as steady as possible. The visualobservations of the visibility were corrected for personal errorfrom the curve of errors previously described, and when thevisibility curve was drawn, a formula was found to express it asclosely as possible, from… … The visibility curve is therefore practically the same as thatcalculated for a double source whose ratio of brightness isequal to 07. Now, D in the formula for V, or the period of the curve, isinversely proportional to the distance between the componentsof the pair of lines, this distance being…
Spectrum analysis
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