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Updated: May 29, 2025
It was known that the direction of the line of refraction varied with every variation in the direction of the line of incidence, but it was not known how; that is, what changes of the one corresponded to the different changes of the other. In this case any law different from the true one must have led to false results.
But, the moment we deviate from the parallelism with the axis, double refraction sets in. If, therefore, a beam that has been rendered conical by a converging lens be sent through the spar so that the central ray of the cone passes along the axis, this ray only will escape double refraction.
Now as in the natural section of the crystal, made by a plane parallel to two opposite faces, which plane is here represented by the line GG, the refraction of the surfaces which are produced by it will be governed by the hemi-spheroids GNG, according to what has been explained in the preceding Theory.
The papers mentioned it, as seen through the optic lens of the society journalist, with what strange refraction. Most of them descried in poor Herminia's tragedy nothing but material for a smile, a sneer, or an innuendo. The Dean himself wrote to her, a piteous, paternal note, which bowed her down more than ever in her abyss of sorrow.
For a moment he stared at her, and she stared back at him with equal gravity; then the same irresistible mirth welled up in both, and Susy's compunctions were swept away on a gale of laughter. When she woke the next morning the sun was pouring in between her curtains of old brocade, and its refraction from the ripples of the Canal was drawing a network of golden scales across the vaulted ceiling.
It was after having explained the refraction of ordinary transparent bodies by means of the spherical emanations of light, as above, that I resumed my examination of the nature of this Crystal, wherein I had previously been unable to discover anything.
He paused for some time in hesitancy to take a farewell of the rapturous vista. A hundred feet lower and the refraction of the light would present it in different coloring and perspective. With his spell of visual intoxication ran the consciousness of being utterly alone.
Kepler's Pecuniary Embarrassments His Inquiries respecting the Law of Refraction His Supplement to Vitellio His Researches on Vision His Treatise on Dioptrics His Commentaries on Mars He discovers that the orbit of Mars is an Ellipse, with the Sun in one focus And extends this discovery to all the other Planets He establishes the two first laws of Physical Astronomy His Family Distresses Death of his Wife He is appointed Professor of Mathematics at Linz His Method of Choosing a Second Wife Her Character, as given by Himself Origin of his Treatise on Gauging He goes to Ratisbon to give his Opinion to the Diet on the change of Style He refuses the Mathematical Chair at Bologna.
Zayla is the normal African port, a strip of sulphur-yellow sand, with a deep blue dome above, and a foreground of the darkest indigo. The buildings, raised by refraction, rose high, and apparently from the bosom of the deep.
The landscape takes on the prismatic colours of refraction, so that, while you can easily make out red, white, and blue Chinese dragons and mythological monsters, you are unable to discover the more welcome succulence, say, of a partridge on a limb.
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