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 ...
... 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 ...
Page 7
... coincide , let R'S ' be the intersection of the plane SRR ' with the plane Q'R'N ' . QR ) Now are parallel to RN Q'R ' { R'N ' .. the plane QRS is parallel to the plane Q'R'S ' , ( Euc . XI . 15 ) , ...... st . line RS ..... st . line ...
... coincide , let R'S ' be the intersection of the plane SRR ' with the plane Q'R'N ' . QR ) Now are parallel to RN Q'R ' { R'N ' .. the plane QRS is parallel to the plane Q'R'S ' , ( Euc . XI . 15 ) , ...... st . line RS ..... st . line ...
Page 16
... coincides with F. ( iv ) As Q continues to move in the same direction , from F to A , v becomes negative and approaches from - ∞ towards A ; and Q , F coincide at A. E F ( v ) When u becomes negative and Q moves 16 MOTION OF CONJUGATE ...
... coincides with F. ( iv ) As Q continues to move in the same direction , from F to A , v becomes negative and approaches from - ∞ towards A ; and Q , F coincide at A. E F ( v ) When u becomes negative and Q moves 16 MOTION OF CONJUGATE ...
Page 17
... 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 method ...
... 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 method ...
Page 20
... coincides with F , the principal focus . ( ii ) AsQmoves from an in- finite distance up to 0 , F also moves up to 0 , and Q , F will coincide at O. Since when u = r , v also = r . ( iii ) As Q moves from O up to A , F also moves from O ...
... coincides with F , the principal focus . ( ii ) AsQmoves from an in- finite distance up to 0 , F also moves up to 0 , and Q , F will coincide at O. Since when u = r , v also = r . ( iii ) As Q moves from O up to A , F also moves from O ...
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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.