A Treatise on Optics |
From inside the book
Results 1-5 of 64
Page 16
... equation - + ข и = 2 R Я 24. It is sometimes convenient to determine the position of the geometrical focus of a reflected pencil by its distance from the centre of the reflecting surface , instead of its distance from the point of ...
... equation - + ข и = 2 R Я 24. It is sometimes convenient to determine the position of the geometrical focus of a reflected pencil by its distance from the centre of the reflecting surface , instead of its distance from the point of ...
Page 17
... equation the case of a convex mirror has been taken in order that all the lines which enter may be measured in a positive direction . The remarks of Art . 23 will , mutatis mutandis , apply to this . The result 1 1 2 + 9 P r 1 HID ...
... equation the case of a convex mirror has been taken in order that all the lines which enter may be measured in a positive direction . The remarks of Art . 23 will , mutatis mutandis , apply to this . The result 1 1 2 + 9 P r 1 HID ...
Page 28
... equation which is approximately true when small , becomes strictly true in the limit when y = 0 . μ v y is In a similar manner it may be shewn that the relation 1 μ - 1 - -- и = r ( Art . 27 ) , when put in the form - Y == r И = μ yy ...
... equation which is approximately true when small , becomes strictly true in the limit when y = 0 . μ v y is In a similar manner it may be shewn that the relation 1 μ - 1 - -- и = r ( Art . 27 ) , when put in the form - Y == r И = μ yy ...
Page 29
... equation is that of a curve which by revolution about SH generated a surface such as is required ; and which is commonly called an aplanatic surface . COR . 1. If the rays diverging from S , are to diverge from a point H after ...
... equation is that of a curve which by revolution about SH generated a surface such as is required ; and which is commonly called an aplanatic surface . COR . 1. If the rays diverging from S , are to diverge from a point H after ...
Page 30
... equation SP— μ . HP = C were expressed in rectangular co - ordinates , it would give an algebraic curve of the fourth degree . In the particular case of C = 0 , the surface will be a sphere . The discussion of aplanatic surfaces was ...
... equation SP— μ . HP = C were expressed in rectangular co - ordinates , it would give an algebraic curve of the fourth degree . In the particular case of C = 0 , the surface will be a sphere . The discussion of aplanatic surfaces was ...
Other editions - View all
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
Popular passages
Page 299 - CAMPBELL : — THE NATURE OF THE ATONEMENT AND ITS RELATION TO REMISSION OF SINS AND ETERNAL LIFE. Fourth and Cheaper Edition, crown 8vo. 6s. "Among the first theological treatises of this generation.
Page 300 - AN ELEMENTARY TREATISE ON THE LUNAR THEORY, with a Brief Sketch of the Problem up to the time of Newton. Second Edition, revised. Crown 8vo. cloth. 5*. 6d. Hemming. — AN ELEMENTARY TREATISE ON THE DIFFERENTIAL AND INTEGRAL CALCULUS, for the Use; of Colleges and Schools.
Page 300 - FROST.— The First Three Sections of Newton's Principia. With Notes and Problems in illustration of the subject. By PERCIVAL FROST, MA late Fellow of St. John's College, Cambridge, and Mathematical Lecturer of Jesus College. Crown 8vo. cloth, 10s.
Page 302 - Crown 8vo. 7s. 6d. HOWARD. — The Pentateuch ; Or, the Five Books of Moses. Translated into English from the Version of the LXX. With Notes on its Omissions and Insertions, and also on the Passages in which it differs from the Authorized Version. By the Hon. HENRY HOWARD, DD Crown 8vo. GENESIS, One Volume, 8s. 6d. ; EXODUS AND LEVITICUS, One Volume, 10s. 6d. ; NUMBERS AND DEUTERONOMY, One Volume, 10s. 6d. HOZIER. — The Seven Weeks' War ; Its Antecedents and its Incidents.