Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 862
... crystals . Wave - surface for ordinary ray spherical , for extra- ordinary ray spheroidal . Extraordinary index . Property of tourmaline , 1105 . Nicol's prism , 1106. Colours produced by thin plates of selenite , 1107. Rectilinear ...
... crystals . Wave - surface for ordinary ray spherical , for extra- ordinary ray spheroidal . Extraordinary index . Property of tourmaline , 1105 . Nicol's prism , 1106. Colours produced by thin plates of selenite , 1107. Rectilinear ...
Página 1011
... crystal ; the axis being properly speaking not a definite line but a definite direction . The angles of the crystal are the same in all specimens ; but the lengths of the three edges ( which may be called the obique length , breadth ...
... crystal ; the axis being properly speaking not a definite line but a definite direction . The angles of the crystal are the same in all specimens ; but the lengths of the three edges ( which may be called the obique length , breadth ...
Página 1122
... crystals . We have now to mention the important fact that the two rays furnished by double refraction are polarized , the ... crystal , travel with minimum velocity ; while the most rapid pro- pagation will be attained by rays whose ...
... crystals . We have now to mention the important fact that the two rays furnished by double refraction are polarized , the ... crystal , travel with minimum velocity ; while the most rapid pro- pagation will be attained by rays whose ...
Página 1124
... crystal.1 A ray of common light SI undergoes double refrac- tion on entering the prism . Of the two rays thus formed , the ordinary ray is totally reflected on meeting the first sur- face of the balsam , and passes out at one side of ...
... crystal.1 A ray of common light SI undergoes double refrac- tion on entering the prism . Of the two rays thus formed , the ordinary ray is totally reflected on meeting the first sur- face of the balsam , and passes out at one side of ...
Página 1128
... crystal at P. P B Fig . 781. - Theory of Rings and Cross . Draw A C , DB parallel to OP , and complete the rectangle AC B D. Then the length and breadth of this rectangle are approximately the direc- tions of vibration of the two com ...
... crystal at P. P B Fig . 781. - Theory of Rings and Cross . Draw A C , DB parallel to OP , and complete the rectangle AC B D. Then the length and breadth of this rectangle are approximately the direc- tions of vibration of the two com ...
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Términos y frases comunes
achromatic analyser angle of incidence beam body bright lines called centimetres centre coincidence colours concave mirror conjugate foci convex convex lens crystal curvature denote diameter direction distance employed equal experiment eye-piece flame focal length frequency of vibration fundamental note glass harmonics Hence Iceland-spar incident ray index of refraction interval inverted law of sines lens lenses luminous point magnifying power medium metres minimum deviation nearly node normal number of vibrations object object-glass oblique observer obtained octave optical ordinary parallel particles pencil perpendicular pipe pitch placed plane mirror plate polarization portion position principal axis principal focus prism produced propagation radius rarefaction ratio reflected rays refrangibility represented retina rotation screen seen side slit solar spectra spectrum spherical string subtends surface telescope tion tone traversing tube undulation velocity of sound vertical vibrations vibrations per second violet virtual image visual angle wave-front wave-length waves