An Elementary Treatise on Geometrical Optics ... |
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Page 2
... placed . It is generally considered to be of a conical form with the material point at its vertex . If the material point be at an indefinitely great distance , the cone will become a cylinder . ( 2 ) A ray of light is the limiting form ...
... placed . It is generally considered to be of a conical form with the material point at its vertex . If the material point be at an indefinitely great distance , the cone will become a cylinder . ( 2 ) A ray of light is the limiting form ...
Page 11
... light emanating from the focus of a paraboloid of revolu- tion whose concave surface is reflecting , will be reflected as a pencil of parallel rays . 11. A luminous point is placed at the focus of LAWS OF REFLECTION AND REFRACTION . 11.
... light emanating from the focus of a paraboloid of revolu- tion whose concave surface is reflecting , will be reflected as a pencil of parallel rays . 11. A luminous point is placed at the focus of LAWS OF REFLECTION AND REFRACTION . 11.
Page 12
William Steadman Aldis. 11. A luminous point is placed at the focus of an ellipse , the inner side of which can reflect light . Prove that any ray after two reflections from the curve will return to the focus from which it started , and ...
William Steadman Aldis. 11. A luminous point is placed at the focus of an ellipse , the inner side of which can reflect light . Prove that any ray after two reflections from the curve will return to the focus from which it started , and ...
Page 13
... placed so as to be all per- pendicular to the same plane , their intersections with which form an acute - angled triangle ; a ray proceeding from a certain point in this plane after one reflection at each of the mirrors proceeds on its ...
... placed so as to be all per- pendicular to the same plane , their intersections with which form an acute - angled triangle ; a ray proceeding from a certain point in this plane after one reflection at each of the mirrors proceeds on its ...
Page 17
... placed , as at E , will receive the reflected pencil precisely as if the light did really proceed from A ' , and will therefore see a luminous point at A ' similar to the original point at A. If there be a series of points above the ...
... placed , as at E , will receive the reflected pencil precisely as if the light did really proceed from A ' , and will therefore see a luminous point at A ' similar to the original point at A. If there be a series of points above the ...
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Common terms and phrases
2nd edition 3rd edition 4th edition Aeneid angle of incidence astronomical telescope axis Book Camb Cambridge centre concave convex lens cos² Crown 8vo Demy 8vo diameter direction distance diverge emergence English equal eye-glass eye-lens eye-piece F. A. PALEY Fcap Fellow of St focal length foci formula French geometrical focus glass Grammar Greek Hence illumination image formed inches incident ray index of refraction J. H. FREESE John's College last Article late Fellow Latin lenses LL.D luminous point magnifying power Mathematical minimum deviation object object-glass obliquely parallel rays pass pencil pencil of light pencil of parallel perpendicular placed portion primary plane prism Professor radius ray of light reflected ray reflecting surface refracted ray refraction or reflection refractive index revised School screen Small post 8vo spectrum sphere spherical surface Translated triangle Trinity College v₁ vertex whence
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