An Elementary Treatise on Geometrical Optics ... |
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Page 21
... formula ( 2 ) will be universally true whatever may be the relative positions of the points d , Q , O and F , if the convention be adopted that lines measured in one direction from A , say to the right of A , shall be considered ...
... formula ( 2 ) will be universally true whatever may be the relative positions of the points d , Q , O and F , if the convention be adopted that lines measured in one direction from A , say to the right of A , shall be considered ...
Page 22
... formula ( 2 ) of the last Article holds . 28. It is sometimes convenient to take the centre of the spherical surface as point of reference . In this case we shall take the figure of the last Article as the typical one , because in that ...
... formula ( 2 ) of the last Article holds . 28. It is sometimes convenient to take the centre of the spherical surface as point of reference . In this case we shall take the figure of the last Article as the typical one , because in that ...
Page 23
... . FA = μFO.QA , AO = r , AQ = u , AF = v , ( ru ) v = μ ( r− v ) u , : . μru - rv = ( μ − 1 ) uv , or dividing by urv μ v - 1 μ И 1 30. The formula proved in the last Article is of REFLECTION AND REFRACTION OF DIRECT PENCILS . 23.
... . FA = μFO.QA , AO = r , AQ = u , AF = v , ( ru ) v = μ ( r− v ) u , : . μru - rv = ( μ − 1 ) uv , or dividing by urv μ v - 1 μ И 1 30. The formula proved in the last Article is of REFLECTION AND REFRACTION OF DIRECT PENCILS . 23.
Page 24
... formula of the last Article becomes in this case , or the formula of Art . 24 . μ ข - 1 น = v = μu , 0 , Again it is found , and the reason will be given in the next Article , that any formula for refraction will give the corresponding ...
... formula of the last Article becomes in this case , or the formula of Art . 24 . μ ข - 1 น = v = μu , 0 , Again it is found , and the reason will be given in the next Article , that any formula for refraction will give the corresponding ...
Page 26
... formula , putting u∞ , or 1 И μ ข - 1 = μ - 1 = 0 , we get v = μ - 1 ° μη The point . F whose distance from A is thus determined is called the principal focus of the refracting surface . 34. Again , taking the formula 1 + ข - 1 2 น it ...
... formula , putting u∞ , or 1 И μ ข - 1 = μ - 1 = 0 , we get v = μ - 1 ° μη The point . F whose distance from A is thus determined is called the principal focus of the refracting surface . 34. Again , taking the formula 1 + ข - 1 2 น it ...
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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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