A Treatise on Optics |
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Page vi
... face , incidence centrical and excentrical - axis of a surface , 59 ; oblique pencil reflected at a plane surface ... faces , refracting angle , principal section of a prism , 88 ; deviation through a prism , minimum deviation , 90–94 ...
... face , incidence centrical and excentrical - axis of a surface , 59 ; oblique pencil reflected at a plane surface ... faces , refracting angle , principal section of a prism , 88 ; deviation through a prism , minimum deviation , 90–94 ...
Page 49
... face ; in other cases it is incident excentrically . A distinction must be preserved between the centre of the surface and the centre of the face ; the former is the centre of the sphere of which the reflecting or refracting surface is ...
... face ; in other cases it is incident excentrically . A distinction must be preserved between the centre of the surface and the centre of the face ; the former is the centre of the sphere of which the reflecting or refracting surface is ...
Page 65
... face , to which every ray of the beam of refracted rays is a tangent . Rays incident beyond S , T are internally reflected within the denser medium . The caustic just obtained enables us to illustrate the deformation of the visible ...
... face , to which every ray of the beam of refracted rays is a tangent . Rays incident beyond S , T are internally reflected within the denser medium . The caustic just obtained enables us to illustrate the deformation of the visible ...
Page 71
... faces , that face will appear as bright as polished silver . This property of internal reflexion is employed in the camera CRITICAL ANGLE . 71.
... faces , that face will appear as bright as polished silver . This property of internal reflexion is employed in the camera CRITICAL ANGLE . 71.
Page 76
... faces of the prism , and their inclination to one another is the refracting angle of the prism . A plane perpendicular to each of the faces , and therefore to the edge of the prism , is called a principal section of the prism or of the ...
... faces of the prism , and their inclination to one another is the refracting angle of the prism . A plane perpendicular to each of the faces , and therefore to the edge of the prism , is called a principal section of the prism or of the ...
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Common terms and phrases
aberration achromatism angle of incidence axis QA bright centre circle of least coincides colours concave conical surfaces convex lens cos² Crown 8vo cuts the axis deviation diameter direct pencil distance emergent equation excentrical eye-glass eye-piece Fcap field of view fixed lines focal length geometrical focus Hence illumination image formed incident directly incident pencil index of refraction intersection lenses luminous point magnifying power medium object object-glass parallel rays passes pencil of parallel pencil of rays pencil whose axis perpendicular plane surface point of incidence point q position primary plane principal focus principal plane prism radius rays incident reflected or refracted reflected pencil reflexion or refraction refracted rays refracting angle refracting surface refractive index shew small oblique pencil small pencil spectrum sphere spherical reflector spherical surface subtends supposed telescope thin lens v₁ v₂ αμ
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