Light: A Course of Experimental Optics, Chiefly with the LanternMacmillan, 1882 - 367 σελίδες |
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Σελίδα 7
... seen , as well as to lay stress on the one or two points which give absolute safety in manipulation , or are necessary to secure good effects ; for two operators will differ by as much as forty per cent . in the effect they obtain from ...
... seen , as well as to lay stress on the one or two points which give absolute safety in manipulation , or are necessary to secure good effects ; for two operators will differ by as much as forty per cent . in the effect they obtain from ...
Σελίδα 22
... seen through three perforated cards arranged with an interval between them , if all three aper- tures are in a perfectly straight line ; and we are conscious that if any opaque body be held in the straight line between our eye and a ...
... seen through three perforated cards arranged with an interval between them , if all three aper- tures are in a perfectly straight line ; and we are conscious that if any opaque body be held in the straight line between our eye and a ...
Σελίδα 25
... seen that the rays from its top and bottom , or right and left , if they proceed in straight lines , must cross at the aperture A , those from the top proceeding to form its image I at the bottom . It is further clear that the relative ...
... seen that the rays from its top and bottom , or right and left , if they proceed in straight lines , must cross at the aperture A , those from the top proceeding to form its image I at the bottom . It is further clear that the relative ...
Σελίδα 28
... seen that if this impinges at right angles it returns on its own path ; but that , if the ray be incident at any angle with the perpendicular index , it is reflected at the same angle , as shown in the figure , on the other side of that ...
... seen that if this impinges at right angles it returns on its own path ; but that , if the ray be incident at any angle with the perpendicular index , it is reflected at the same angle , as shown in the figure , on the other side of that ...
Σελίδα 29
... seen that if more than one mirror be employed , images may easily be further multiplied . Two parallel mirrors , by successive reflections , can be made to give a number of images , a familiar example of which may be found by looking at ...
... seen that if more than one mirror be employed , images may easily be further multiplied . Two parallel mirrors , by successive reflections , can be made to give a number of images , a familiar example of which may be found by looking at ...
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adjusted analyser aperture apparatus appear arranged axes axis bands beam beautiful bi-axial black card blue calcite Cambridge centre circular Clifton College colour convergent crossed Crown 8vo crystal dark diffracted direction disc dispersion double refraction Edition effects ELEMENTARY ether experiment Extra fcap film focus focusing give glass green heat HISTORY Illustrations interference J. P. MAHAFFY lantern late Fellow law of sines lens lenses lime-light lines matter mica mirror molecules motion nearly Newton's Newton's rings Nicol Nicol Prism nozzle numerous object optic axis optical stage ordinary Owens College parallel particles perpendicular phenomena plane plane-polarised polariscope polarised position prism produced Professor quarter-wave plate quartz rays retardation revised right angles rings rotated School screen seen selenite shown slide slide-stage slit solution spar spectra spectrum surface theory thickness thin tion tourmaline TREATISE Trinity College tube uni-axial velocity vibrations violet wave-length waves
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