A Treatise on Optics |
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Page vi
... passing through a prism , 96 ; Def . of a lens , axis of a lens , forms of lenses , 97 , 98 ; geometrical focus of a pencil passing through a lens , 99 , 100 ; principal focus , focal length , of a lens , - -concave and convex lens ...
... passing through a prism , 96 ; Def . of a lens , axis of a lens , forms of lenses , 97 , 98 ; geometrical focus of a pencil passing through a lens , 99 , 100 ; principal focus , focal length , of a lens , - -concave and convex lens ...
Page 8
... passing through QR , and RN the normal to the surface at R. Since by the_law of reflexion SR , QA lie in one plane , let them be produced to meet in q . Then since RN , qQ are parallel R R A -N < RQA QRN = = SRN ( Art . 8 8 REFLEXION.
... passing through QR , and RN the normal to the surface at R. Since by the_law of reflexion SR , QA lie in one plane , let them be produced to meet in q . Then since RN , qQ are parallel R R A -N < RQA QRN = = SRN ( Art . 8 8 REFLEXION.
Page 9
... pass through the point q . Hence the form of the reflected pencil is that of a cone whose axis is 4Q , and vertex the point q - equidistant with Q from the reflecting surface , and on the opposite side of it . COR . 1. Since the angles ...
... pass through the point q . Hence the form of the reflected pencil is that of a cone whose axis is 4Q , and vertex the point q - equidistant with Q from the reflecting surface , and on the opposite side of it . COR . 1. Since the angles ...
Page 11
... passing through QR , and RN the normal to the surface at R. Since by the law of reflexion SR , QA lie in one plane , let them be produced to meet in q . Then since RN , qQ are parallel R R A -N < RQA = < QRN = < SRN ( Art 8 REFLEXION.
... passing through QR , and RN the normal to the surface at R. Since by the law of reflexion SR , QA lie in one plane , let them be produced to meet in q . Then since RN , qQ are parallel R R A -N < RQA = < QRN = < SRN ( Art 8 REFLEXION.
Page 11
... pass through the point q . Hence the form of the reflected pencil is that of a cone whose axis is AQ , and vertex the point q - equidistant with Q from the reflecting surface , and on the opposite side of it . COR . 1. Since the angles ...
... pass through the point q . Hence the form of the reflected pencil is that of a cone whose axis is AQ , and vertex the point q - equidistant with Q from the reflecting surface , and on the opposite side of it . COR . 1. Since the angles ...
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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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