An Elementary Treatise on Geometrical Optics ... |
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Page 4
... normal to the plane` at that point . We know , from the example of the earth , which is really spherical , but of which any small portion appears to be a plane , that any portion of a spherical surface sufficiently small in comparison ...
... normal to the plane` at that point . We know , from the example of the earth , which is really spherical , but of which any small portion appears to be a plane , that any portion of a spherical surface sufficiently small in comparison ...
Page 5
... normal to the bounding surface is called the angle of incidence of the ray . 11. When a ray is so incident , the ... normal to the surface to that on which the inci- dent ray lies . ( 2 ) The angle which the reflected ray makes with this ...
... normal to the bounding surface is called the angle of incidence of the ray . 11. When a ray is so incident , the ... normal to the surface to that on which the inci- dent ray lies . ( 2 ) The angle which the reflected ray makes with this ...
Page 6
... normal to the surface dividing the media , at the point O where the ray is incident . Let AOB be the line of intersection of this bounding surface with the plane of the paper . A IN B R By the first law , the reflected ray OQ and the ...
... normal to the surface dividing the media , at the point O where the ray is incident . Let AOB be the line of intersection of this bounding surface with the plane of the paper . A IN B R By the first law , the reflected ray OQ and the ...
Page 7
... normal to the bounding surface ; on the other hand , in passing from a denser medium into one less dense , the light is bent away from the normal . 13. It is usual to consider separately the two portions into which the ray is divided ...
... normal to the bounding surface ; on the other hand , in passing from a denser medium into one less dense , the light is bent away from the normal . 13. It is usual to consider separately the two portions into which the ray is divided ...
Page 9
... normal to the separating surface . Assume also that μ is greater than unity , so that the second medium is denser than the first . It is evident that , if & be given , since sin o ' is less than sin , and therefore less than unity , a ...
... normal to the separating surface . Assume also that μ is greater than unity , so that the second medium is denser than the first . It is evident that , if & be given , since sin o ' is less than sin , and therefore less than unity , a ...
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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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