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Updated: May 10, 2025
We may sum up by saying that very fine particles scatter more blue light than red light, and that consequently more red light than blue light passes through a turbid medium, and that the rays obey the law prescribed by theory. I will exemplify this once more by using the whole spectrum and placing this cell, which contains hyposulphite of soda in solution in water, in front of the slit.
They can speak in tongues; they can talk about the solar spectrum; they can interpret Chaucer, criticise Shakespeare, understand Browning. There is no literature, ancient or modern, that they do not dig up by the roots and turn over, no history that they do not drag before the club for final judgment. Boston is no longer divided into wards, but into Browning "sections."
Nor can any scientist in the world say at the present time how much is really included in the spread-out fan of analyzed sunlight. Thus much scientists have known for some time. Certain other facts, however, in connection with the solar spectrum are of greater importance than are its more sensible phenomena.
The experimental answer to this question is now before you: the green band of the spectrum alone remains upon the screen. The impurity of natural colours is strikingly illustrated by an observation recently communicated to me by Mr. Woodbury. On looking through a blue glass at green leaves in sunshine, he saw the superficially reflected light blue.
The spectrum of national security challenges will expand as the threat of nuclear annihilation subsides. The decisive victory achieved by the coalition forces over Iraq during Desert Storm should give future aggressors of major regional conflict cause to pause.
Thus, for example, the ordinary Freuenhofer spectrum of the sun shows us no trace of the element helium, though through other observations at the time of eclipse Professor Lockyer had discovered that element there, as we have seen, some thirty years before anything was known of it on the earth.
The sense of colour, colour both captive and atmospheric, was a new and persistent delight, for it was colour purified, specialized, and infinitely extended in either direction from the crudity of the seven-winged spectrum.
In a recent eclipse photographs were taken of the spectra of the lower part of the sun's atmosphere by itself, and it was found that the spectrum of this restricted area taken by itself gave the lines which specialize the spectra of so different a star as Procyon.
With some lateral light it becomes of a colour combined of the direct spectrum of the central object, and of the circumjacent objects, in proportion to their respective quantity and brilliancy. 3.
Its spectrum indicates that it is smothered with absorbing vapors, a sun near extinction which, at intervals, experiences an accession of energy and bursts through its stifling envelope with explosive radiance, only to faint and sink once more. It is well to use our largest aperture in examining this star.
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