Advanced theory of electricity and magnetism; A text-book for colleges and technical schools (1915)
Franklin, William S. (William Suddards), 1863-1930, MacNutt, Barry, 1878-1936. joint author · New York, Macmillan · leaf 299
he shadow becomesvisible; where the Roentgen rays have been greatly reduced inintensity by the bones of the hand the screen remains dark,where the Roentgen rays have been slightly reduced in intensityby the flesh the screen is moderately luminous, and where therays have not been reduced at all in… … Fig.5209. The focusing tube. —In order that a shadow may be sharplydefined the radiation which produces the shadow must emanatefrom a very small source. Figure 209 shows a Crookes tube witha concave cathode c from which the cathode rays are thrown offin a convergent stream which strikes a small…
Electricity · Magnetism
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
