The polarisation of light: a lecture |
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Términos y frases comunes
13th December analyser angle of turning axes and edges axis beam of light beauty blue centre colours complementary compound piece concave selenite continuous spectrum crystal more rapidly crystal plates dark band direction distance from crest distance whereby double refraction double-image prism effect its displacements exhibits experiments extinguished fact Fcap followed Iceland spar instrument be turned isochromatic curves JOHN ANGELL Lectures LL.D MAGNETISM AND ELECTRICITY ments nature neutralisation Nicol's prisms obliterated depends plane of polarisation plate be turned plate of crystal POLARISATION OF LIGHT polarised light Post 8vo pressure produce a band Professor M'KENDRICK ray of light rectangular positions resulting tint retarded right angles round through 45 set of waves sets of rays slit sphere of Iceland Spottiswoode strain take a concave thicker tion tourmalin transmitted traversed the crystal turned farther round turned round turning amounts vibrations violet wave motion wedge whereby one set white light WILLIAM LEES
Pasajes populares
Página 4 - The author is at home in his subject, and presents his views in an almost singularly clear and satisfactory manner. . . . The volume is a valuable contribution to one of the most difficult, and at the same time one of the most important subjects of investigation at the present day.
Página 12 - ... in precisely the same stage of oscillation, is called breadth of the wave, that is, the distance from crest to crest or from hollow to hollow. There is a striking similarity between the rising and falling of waves, and the vibrations of a pendulum ; and it is a very interesting and remarkable fact that a wave always travels its own breadth in precisely the same time that a pendulum whose length is equal to that breadth, performs one vibration.