Annual Report of the Board of Regents of the Smithsonian Institution |
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Сторінка 176
two dark lines of absorption , where light of the arc spectrum was taken away .
Similarly , in the spectrum of iron , a great number of bright lines are found in the
green ; and if iron vapor is interposed between an electric arc light and the slit of
...
two dark lines of absorption , where light of the arc spectrum was taken away .
Similarly , in the spectrum of iron , a great number of bright lines are found in the
green ; and if iron vapor is interposed between an electric arc light and the slit of
...
Сторінка 179
The accompanying illustration ( pl . 2 ) is taken from an interesting portion of such
a spectrum map . It shows in the first place that a large number of lines are found
in the sun - spot spectrum which are either very indistinct , or not to be seen at ...
The accompanying illustration ( pl . 2 ) is taken from an interesting portion of such
a spectrum map . It shows in the first place that a large number of lines are found
in the sun - spot spectrum which are either very indistinct , or not to be seen at ...
Сторінка 246
the groupergy line is as extending out radially from the wire and bending over to
meet a considerable portion of the ground ... Surrounding the wire at this time
there will be a magnetic field , which may be represented by whorls or lines of ...
the groupergy line is as extending out radially from the wire and bending over to
meet a considerable portion of the ground ... Surrounding the wire at this time
there will be a magnetic field , which may be represented by whorls or lines of ...
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