A Treatise on Optics |
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Page 3
... considered separately . 8. Law of reflexion . 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 incidence , and on ...
... considered separately . 8. Law of reflexion . 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 incidence , and on ...
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 12
... 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 .
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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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