Optics Without MathematicsSociety for promoting Christian knowledge, 1883 - 124 páginas |
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Página 26
... positions of R and F on either side of C are invariable , depending on the equality of angles , the positions corre- sponding to each other are called Conjugate , that But now , is , connected , Foci . There 26 OPTICS WITHOUT MATHEMATICS .
... positions of R and F on either side of C are invariable , depending on the equality of angles , the positions corre- sponding to each other are called Conjugate , that But now , is , connected , Foci . There 26 OPTICS WITHOUT MATHEMATICS .
Página 27
... conjugate focus , and the assemblage of all these foci will produce a bright image , corresponding with the object . These pleasing experiments with images require however larger mirrors than may come in our way , and we can show the ...
... conjugate focus , and the assemblage of all these foci will produce a bright image , corresponding with the object . These pleasing experiments with images require however larger mirrors than may come in our way , and we can show the ...
Página 28
... conjugate focus Now let us see about the rays from the other end of the taper . We had better draw another figure to avoid confusion . Then we have the conjugate focus of Z at % , as the con- jugate focus of A has just been shown to be ...
... conjugate focus Now let us see about the rays from the other end of the taper . We had better draw another figure to avoid confusion . Then we have the conjugate focus of Z at % , as the con- jugate focus of A has just been shown to be ...
Página 29
... conjugate focus between Z and a ; the whole object AZ is therefore exactly represented by a corresponding set of foci between a and z , or optically speaking , az is the image of AZ . But it is upside down ! This may seem strange , but ...
... conjugate focus between Z and a ; the whole object AZ is therefore exactly represented by a corresponding set of foci between a and z , or optically speaking , az is the image of AZ . But it is upside down ! This may seem strange , but ...
Página 57
... conjugate foci ; a very interesting as well as instructive experi- Set a convex lens upright on some kind of support near the edge of a table , on a level with the flame of a candle which may be moved across the table towards or from ...
... conjugate foci ; a very interesting as well as instructive experi- Set a convex lens upright on some kind of support near the edge of a table , on a level with the flame of a candle which may be moved across the table towards or from ...
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Términos y frases comunes
angles of incidence aperture axis beautiful called candle circle cloth boards colour concave lens concave mirror conjugate foci converging convex lens course crossing crystal crystalline lens curious curves dark direction dispersion distance Double Refraction edge equal angles equi-convex eye-lens Fcap feet focal image focal length form an image fraction front happens hole inches larger lenses look looking-glass magnifying power microscope minute moon Newtonian reflector NORTHUMBERLAND AVENUE object object-glass opposite optical parallel rays perfect perfectly picture plane mirror polarised position prism produce PROMOTING CHRISTIAN KNOWLEDGE properties of light proportion radiant radius rainbow ray passes reflected rays reflecting telescopes refraction retina reverse right angles seen shorter focus side sideways sine Sir EDMUND BECKETT spectrum speculum sphere spherical spherical aberration straight line suppose surface telescope thing tion turned undulations violet waves wonderful
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