A Treatise on Optics |
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Page v
... medium , rays , pencil of light , incidence direct and oblique , 2-7 ; laws of reflexion and refraction , 8—10 ; foundation of such laws , 11 ; Def . of Geometrical and Principal Focus , focal length , aberration , 12 , 13 ; Reflexion ...
... medium , rays , pencil of light , incidence direct and oblique , 2-7 ; laws of reflexion and refraction , 8—10 ; foundation of such laws , 11 ; Def . of Geometrical and Principal Focus , focal length , aberration , 12 , 13 ; Reflexion ...
Page vi
... any manner Absolute and relative refractive index , 118 ; method of determining the path of a ray in a medium of varying refractive power under various 68 102 circumstances , 120-125 ; Formula for determining the course of vi CONTENTS .
... any manner Absolute and relative refractive index , 118 ; method of determining the path of a ray in a medium of varying refractive power under various 68 102 circumstances , 120-125 ; Formula for determining the course of vi CONTENTS .
Page 2
... medium . Such as a vacuum , glass , water , & c . 4. Def . When light emanates from a luminous point , we regard it as made up of rays , understanding by a ray the smallest portion of light which can be separately transmitted , stopped ...
... medium . Such as a vacuum , glass , water , & c . 4. Def . When light emanates from a luminous point , we regard it as made up of rays , understanding by a ray the smallest portion of light which can be separately transmitted , stopped ...
Page 3
... medium different from that in which it is proceeding , a portion of it is scattered or dispersed over the surface and makes the surface visible ; another portion is in general reflected in the first medium ( according to a law which ...
... medium different from that in which it is proceeding , a portion of it is scattered or dispersed over the surface and makes the surface visible ; another portion is in general reflected in the first medium ( according to a law which ...
Page 4
... medium ( reflecting or refracting or both ) : NAN ' the normal to the surface at A ; AQ , AQ " the re- flected and refracted rays respec- tively ; then will the lines QA , Q'A , QUA , NAN ' all lie in one plane , and the QAN = Q'AN ...
... medium ( reflecting or refracting or both ) : NAN ' the normal to the surface at A ; AQ , AQ " the re- flected and refracted rays respec- tively ; then will the lines QA , Q'A , QUA , NAN ' all lie in one plane , and the QAN = Q'AN ...
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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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