Treatise on Practical Light |
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Page 51
... brass cap , and is split and sprung inwards , to grip smoothly an inner sliding tube which carries the lens or other fitting . For this bench it is preferable to mount the lenses and the various mirrors each on a separate inner tube ...
... brass cap , and is split and sprung inwards , to grip smoothly an inner sliding tube which carries the lens or other fitting . For this bench it is preferable to mount the lenses and the various mirrors each on a separate inner tube ...
Page 52
... brass plate , EF . Two brass plates , G , H , are silver - soldered to this , and a tube passes . through a hole in each of these and is soldered in . K is the half - inch hole through the zinc and exactly opposite it is the small hole ...
... brass plate , EF . Two brass plates , G , H , are silver - soldered to this , and a tube passes . through a hole in each of these and is soldered in . K is the half - inch hole through the zinc and exactly opposite it is the small hole ...
Page 53
... brass into a cross - piece , fixed to the top of a brass rod that fits in the various stands . A nut with a conical upper surface screws up and down on this rod , and as it is screwed up , the edges of the curved pieces are forced ...
... brass into a cross - piece , fixed to the top of a brass rod that fits in the various stands . A nut with a conical upper surface screws up and down on this rod , and as it is screwed up , the edges of the curved pieces are forced ...
Page 54
... brass , supported horizontally at a convenient height on a kind of heavy retort stand , with the V upwards , very convenient . The lenses must be mounted in short lengths of brass tube ( " telescope tube " ) , which must all be of the ...
... brass , supported horizontally at a convenient height on a kind of heavy retort stand , with the V upwards , very convenient . The lenses must be mounted in short lengths of brass tube ( " telescope tube " ) , which must all be of the ...
Page 55
... brass , and tubes 1 " diameter , 1 " , FIG . 59. - V Bench for Lenses of Uniform Diameter . 2 " , and 4 " long , are convenient sizes for most purposes . I have also found " angle brass and ğ " tubes very good . Rule of Signs . 40. In ...
... brass , and tubes 1 " diameter , 1 " , FIG . 59. - V Bench for Lenses of Uniform Diameter . 2 " , and 4 " long , are convenient sizes for most purposes . I have also found " angle brass and ğ " tubes very good . Rule of Signs . 40. In ...
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Common terms and phrases
aberration adjusted aperture apparatus Apparatus.-The appear astigmatism axis beam bi-prism block brass bright Canada balsam centre circle coincide collimator colour concave lens concave mirror convex lens cross-wire crystal curvature dark determined deviation diameter difference of path diffraction dioptres disc distance easily edge equal experiment eye-piece film focal length focal plane focus focussed fringes glass plate grating hole horizontal illuminated inches incident inserted lenses liquid Lloyd's mirror magnification measured method mica microscope millimetre mounted moved needle Newton's rings nicol nicol prism nodal points objective observed obtained optical bench ordinary pair pass patch perpendicular piece placed position prism produced radius rays readings reflected refractive index right angles rings rotated scale screen screw seen semi-silvered side silvered slit sodium flame spectrometer spectrum spherical aberration stand straight edge surface telescope thickness tube vertical wave wave plate wave-length white light width wire