A Treatise on Optics |
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Page v
... directly reflected at a spherical surface , 21-25 ; Geometrical and visible image , 26 ; Discussion of a pencil directly refracted at a spherical surface , 27—31 ; Illustrations , —successive reflexions at parallel mirrors and inclined ...
... directly reflected at a spherical surface , 21-25 ; Geometrical and visible image , 26 ; Discussion of a pencil directly refracted at a spherical surface , 27—31 ; Illustrations , —successive reflexions at parallel mirrors and inclined ...
Page 5
... directly ( Art . 6 ) at A on a plane or spherical reflecting or refracting surface . Then Q4 is the axis of the reflected or refracted pencil . Let QR be any ray incident at R whose direction after re- R t FT flexion or refraction ...
... directly ( Art . 6 ) at A on a plane or spherical reflecting or refracting surface . Then Q4 is the axis of the reflected or refracted pencil . Let QR be any ray incident at R whose direction after re- R t FT flexion or refraction ...
Page 6
... directly upon the surface parallel to a fixed diameter , called the axis of the surface . Def . The focal length of a spherical reflecting or refract- ing surface is the distance between the surface and the prin- cipal focus , -measured ...
... directly upon the surface parallel to a fixed diameter , called the axis of the surface . Def . The focal length of a spherical reflecting or refract- ing surface is the distance between the surface and the prin- cipal focus , -measured ...
Page 8
... directly upon a plane reflecting surface , to find its form after reflexion . Let be an origin of light from which a pencil whose axis is QA is incident directly at A on a plane re- flecting surface , QR any ray of the pencil incident ...
... directly upon a plane reflecting surface , to find its form after reflexion . Let be an origin of light from which a pencil whose axis is QA is incident directly at A on a plane re- flecting surface , QR any ray of the pencil incident ...
Page 9
... directly on a plane or spherical reflecting or refracting surface may be regarded as composed of a series of conical surfaces or shells of rays , as QRr , with a common vertex Q and com- mon axis QA . The rays of this Iconical surface ...
... directly on a plane or spherical reflecting or refracting surface may be regarded as composed of a series of conical surfaces or shells of rays , as QRr , with a common vertex Q and com- mon axis QA . The rays of this Iconical surface ...
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Common terms and phrases
aberration achromatism angle of incidence axis QA bright centre circle of least cloth coincides colours concave converge convex lens cos² Crown 8vo cuts the axis determine deviation direct pencil distance emergent equation excentrical eye-glass eye-piece Fcap fixed lines focal length geometrical focus Hence illumination image formed incident directly incident pencil index of refraction intersection lenses luminous point magnifying power medium mirror object object-glass parallel rays passes pencil of light pencil of parallel pencil of rays pencil whose axis perpendicular plane surface point of incidence position primary plane principal focus principal plane prism radii radius rays incident reflected or refracted reflected pencil reflexion or refraction refracted rays refracting angle refracting surface refractive index retina shew small oblique pencil small pencil spectrum sphere spherical reflector spherical surface supposed telescope thin lens v₁ v₂ αμ аф
Popular passages
Page 305 - Eumenides. The Greek Text with English Notes, and an Introduction, containing an Analysis of Miiller's Dissertations.