A Treatise on Optics |
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Page vi
... Primary and Secondary focal line , -circle of least con- fusion , 62-64 ; Illustration of geometrical and visible image , 65 ; Posi- tion of the Foci of a small oblique pencil after reflexion at a spherical surface , 66 ; the same after ...
... Primary and Secondary focal line , -circle of least con- fusion , 62-64 ; Illustration of geometrical and visible image , 65 ; Posi- tion of the Foci of a small oblique pencil after reflexion at a spherical surface , 66 ; the same after ...
Page viii
... Primary Rainbow , 262 ; the caustic after two internal reflexions within a sphere of water , 264-266 ; the Second Rainbow , 267 ; order of colours and dimensions of the rainbow , 269— 272 ; general remarks , 273 . 217 * * * * * * * For ...
... Primary Rainbow , 262 ; the caustic after two internal reflexions within a sphere of water , 264-266 ; the Second Rainbow , 267 ; order of colours and dimensions of the rainbow , 269— 272 ; general remarks , 273 . 217 * * * * * * * For ...
Page 51
... Primary Focal Line , and the point q , the Primary Focus . Again , a section of the pencil by a plane through ¶1⁄2 parallel to the tangent plane of the surface at A , though actually a very elongated figure of eight - as indicated at ...
... Primary Focal Line , and the point q , the Primary Focus . Again , a section of the pencil by a plane through ¶1⁄2 parallel to the tangent plane of the surface at A , though actually a very elongated figure of eight - as indicated at ...
Page 52
... primary plane . 63. Remark . When the aberration of a direct pencil is towards the surface , the primary focus of a small oblique pencil from the same origin is nearer to the surface than the secondary focus , and vice versa . The ...
... primary plane . 63. Remark . When the aberration of a direct pencil is towards the surface , the primary focus of a small oblique pencil from the same origin is nearer to the surface than the secondary focus , and vice versa . The ...
Page 53
... primary focus of small oblique pencils reflected or refracted at consecutive small elements of the surface . This suggests another method of finding the equation to the caustic , which is sometimes convenient . 65. We can now explain ...
... primary focus of small oblique pencils reflected or refracted at consecutive small elements of the surface . This suggests another method of finding the equation to the caustic , which is sometimes convenient . 65. We can now explain ...
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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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