A Treatise on Optics |
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Page 3
... considered separately . 8. Law of reflexion . rays where both When a ray is reflected at the surface of a medium , ( i ) The incident and reflected rays lie in one and the same plane with the normal to the surface at the point of ...
... considered separately . 8. Law of reflexion . rays where both When a ray is reflected at the surface of a medium , ( i ) The incident and reflected rays lie in one and the same plane with the normal to the surface at the point of ...
Page 4
... considered . It is a parameter which varies , ( i ) if the nature of the light be altered , ( ii ) if the relation between the two media be altered . The relation between 4 and p ' is commonly written = sin μ sin p ' . It will in ...
... considered . It is a parameter which varies , ( i ) if the nature of the light be altered , ( ii ) if the relation between the two media be altered . The relation between 4 and p ' is commonly written = sin μ sin p ' . It will in ...
Page 10
... limiting posi- tion of q . R Q FT Let AQ = u , AF = v , lines being considered positive when measured from A in a direction contrary to that of the inci- dent light . Now RQA , RqA being equal to the angles of 10 CONJUGATE FOCI .
... limiting posi- tion of q . R Q FT Let AQ = u , AF = v , lines being considered positive when measured from A in a direction contrary to that of the inci- dent light . Now RQA , RqA being equal to the angles of 10 CONJUGATE FOCI .
Page 11
... considered divergent , as will be done in other cases , but attention to the algebraic sign of u will make the result applicable to a con- vergent pencil . In such a case u is negative and v = μu = a negative quantity , indicates that ...
... considered divergent , as will be done in other cases , but attention to the algebraic sign of u will make the result applicable to a con- vergent pencil . In such a case u is negative and v = μu = a negative quantity , indicates that ...
Page 15
... considered posi- tive when measured from O in a direction opposite to that of the incident pencil . L Also let ROA = 0 , p = of incidence or reflexion of QR . Then φ < r sin RqA__sin ( 4 + 0 ) = Oq sin ORq sin o 9 r sin RQA sin ( 4-0 ) ...
... considered posi- tive when measured from O in a direction opposite to that of the incident pencil . L Also let ROA = 0 , p = of incidence or reflexion of QR . Then φ < r sin RqA__sin ( 4 + 0 ) = Oq sin ORq sin o 9 r sin RQA sin ( 4-0 ) ...
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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.