A Treatise on Optics |
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Page 3
... coincides with the normal to the surface at the point of incidence in other cases the incidence is called oblique . 7. When light is incident on the surface of a medium different from that in which it is proceeding , a portion of it is ...
... coincides with the normal to the surface at the point of incidence in other cases the incidence is called oblique . 7. When light is incident on the surface of a medium different from that in which it is proceeding , a portion of it is ...
Page 7
... coincide , let R'S ' be the intersection of the plane SRR ' with the plane Q'R'N ' . Now QR RN are parallel to SQ'R ' ; R'N ' .. the plane QRS is parallel to the plane Q'R'S ' , ( Euc . XI . 15 ) , st . line RS R'N ' .... st . line R'S ...
... coincide , let R'S ' be the intersection of the plane SRR ' with the plane Q'R'N ' . Now QR RN are parallel to SQ'R ' ; R'N ' .. the plane QRS is parallel to the plane Q'R'S ' , ( Euc . XI . 15 ) , st . line RS R'N ' .... st . line R'S ...
Page 11
... coincide , let R'S ' be the intersection of the plane SRR ' with the plane Q'R'N ' . Now QR RNS are parallel to R R'N ' .. the plane QRS is parallel to the plane Q'R'S ' , ( Euc . XI . 15 ) , st . line RS .... st . line R'S ' , ( Euc ...
... coincide , let R'S ' be the intersection of the plane SRR ' with the plane Q'R'N ' . Now QR RNS are parallel to R R'N ' .. the plane QRS is parallel to the plane Q'R'S ' , ( Euc . XI . 15 ) , st . line RS .... st . line R'S ' , ( Euc ...
Page 18
... coincides with F. ( iv ) As Q continues to move in the same direction , from F to A , v becomes negative and approaches from towards Λ Q , F coincide at A , - co F E ( v ) When u becomes negative and Q moves 16 MOTION OF CONJUGATE FOCI .
... coincides with F. ( iv ) As Q continues to move in the same direction , from F to A , v becomes negative and approaches from towards Λ Q , F coincide at A , - co F E ( v ) When u becomes negative and Q moves 16 MOTION OF CONJUGATE FOCI .
Page 19
... coincides with F , when u becomes -∞ . Similarly the change of relative position may be traced when the reflecting ... coincide with the visible image as seen by an eye in a given position . In a subsequent chapter we propose to give a ...
... coincides with F , when u becomes -∞ . Similarly the change of relative position may be traced when the reflecting ... coincide with the visible image as seen by an eye in a given position . In a subsequent chapter we propose to give a ...
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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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