Geometrical Optics: Adapted to the Use of the Higher Classes in Schools, Etc |
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Page 2
... pencil . " The most convenient form in which to imagine a pencil is a solid cone of rays , of which the centre of light is the vertex . ( iv ) The middle ray , or axis of the cone of rays , is called the " Axis " of the pencil * . ( v ) ...
... pencil . " The most convenient form in which to imagine a pencil is a solid cone of rays , of which the centre of light is the vertex . ( iv ) The middle ray , or axis of the cone of rays , is called the " Axis " of the pencil * . ( v ) ...
Page 3
... pencils of light falling upon plane surfaces and others : in all such cases , unless expressly mentioned , we shall suppose that the axis of the pencil falls perpendicularly on the sur- face . ( vi ) Any substance through which light ...
... pencils of light falling upon plane surfaces and others : in all such cases , unless expressly mentioned , we shall suppose that the axis of the pencil falls perpendicularly on the sur- face . ( vi ) Any substance through which light ...
Page 9
... pencil from q , according to our definition of a divergent pencil in Art . 3 ( v ) , for the rays meet the eye as if they came from one point . An image through which the rays do not really pass , as q , is called " virtual . " Those ...
... pencil from q , according to our definition of a divergent pencil in Art . 3 ( v ) , for the rays meet the eye as if they came from one point . An image through which the rays do not really pass , as q , is called " virtual . " Those ...
Page 11
... pencil of rays from an object to the eye , Fig . 6 . M after any number of reflexions , we shall make use of an ex- tension of this rule - viz .: ( 1 ) Join the eye to last image , and shade to the eye from the points where these lines ...
... pencil of rays from an object to the eye , Fig . 6 . M after any number of reflexions , we shall make use of an ex- tension of this rule - viz .: ( 1 ) Join the eye to last image , and shade to the eye from the points where these lines ...
Page 13
... pencil of rays which fall first on the mirror M1M ,, in order to save confusion : but it is easy to see that in pre- cisely the same manner there will be a series of images formed by a pencil of rays which fall first on N , N ,, of ...
... pencil of rays which fall first on the mirror M1M ,, in order to save confusion : but it is easy to see that in pre- cisely the same manner there will be a series of images formed by a pencil of rays which fall first on N , N ,, of ...
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Common terms and phrases
Algebra angle of incidence Aq AQ ARITHMETIC astronomical beam beginners BROOKE FOSS WESTCOTT called Cambridge caustic curve centre CHAPTER Christ's College circle CLASS-BOOK Clifton College cloth colours concave lens Conic Sections conical converge convex lens cornea course Crown 8vo direction divergent ELEMENTARY TREATISE English Examination Papers explain Extra fcap eye-lens figure focal length formed Fourth Edition Galilean Geometrical Focus glass Grammar Greek Head Master History John's College late Fellow Latin lenses luminous point magnifying power minimum deviation mirror MIXED MATHEMATICS nearer numerous Examples object object-glass OPTICS parallel rays pencil of rays placed plane reflexion point q principal focus principles prism rays close rays fall rays which fall reader red rays reflected rays reflecting telescope retina Schools Second Edition seen shew small pencil spectrum straight line student Suppose telescope tion TRIGONOMETRY violet
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