The Spectroscope and Its Applications |
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Page 75
... coincident with 리 G hydrogen hydrogen F hydrogen ว b E D B magnesium sodium hydrogen FIG . 42.- Spectrum of the sun's photosphere ( below ; and chromosphere ( above ) a prominent dark line in the solar spectrum . Now. 11. ] 75 AND ITS ...
... coincident with 리 G hydrogen hydrogen F hydrogen ว b E D B magnesium sodium hydrogen FIG . 42.- Spectrum of the sun's photosphere ( below ; and chromosphere ( above ) a prominent dark line in the solar spectrum . Now. 11. ] 75 AND ITS ...
Page 76
... coincident with this dark line , that something is Ha G FIG . 43. - C line bright in chromosphere , dark on sun . probably hydrogen . This was one of the first lines determined by M. Janssen in the eclipse of 1868 . There is another ...
... coincident with this dark line , that something is Ha G FIG . 43. - C line bright in chromosphere , dark on sun . probably hydrogen . This was one of the first lines determined by M. Janssen in the eclipse of 1868 . There is another ...
Page 94
... coincident with the two dark lines in the solar spectrum , that the bright lines of the sodium spectrum put these dark lines out altogether , so that they seemed to vanish , as it were , from the solar spec- trum . He goes on : ' In ...
... coincident with the two dark lines in the solar spectrum , that the bright lines of the sodium spectrum put these dark lines out altogether , so that they seemed to vanish , as it were , from the solar spec- trum . He goes on : ' In ...
Page 95
... coincident with the two lines D in the solar spectrum . We have seen that the bright line due to the radi- ation from sodium vapour can be very easily obtained by placing some sodium in a colourless gas flame , but if we now pass the ...
... coincident with the two lines D in the solar spectrum . We have seen that the bright line due to the radi- ation from sodium vapour can be very easily obtained by placing some sodium in a colourless gas flame , but if we now pass the ...
Page 96
... coincident with the two dark lines in the solar spectrum . What does it mean ? " And again the philosopher was not at fault . He said to himself - it is almost possible to see the train of his reasoning in his memoirs- " Sodium has a ...
... coincident with the two dark lines in the solar spectrum . What does it mean ? " And again the philosopher was not at fault . He said to himself - it is almost possible to see the train of his reasoning in his memoirs- " Sodium has a ...
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Common terms and phrases
absorption lines absorption spectrum Aldebaran application arrangement astronomers atmosphere band black lines blue bright lines Bunsen chromosphere coincident collimating lens colour comet continuous spectrum dark lines deal dense determine direct-vision dispersion electric lamp examine experiment F line fact flame Fraunhofer lines gas or vapour gaseous gases give glass green Huggins hydrogen lines important Induction Coils instance instrument iron Kirchhoff lens line of hydrogen lithium magnesium vapour metal minimum deviation nebula Newton NORMAN LOCKYER number of prisms observing telescope obtained Orionis pass perfectly easy pressure Professor prominences radiation rainbow band ray of light refracted refrangibility Science scientific seen showing shown in Fig slit sodium lines sodium vapour solar prominences solar spectrum solid or liquid spec spectra spectrum analysis Spectrum of carbon star spectroscope strontium substances sun-spot sunlight surface thing three prisms trum tube velocity violet visible white light Wollaston yellow
Popular passages
Page 96 - When this light was allowed to fall through a suitable flame coloured by common salt, dark lines were seen in the spectrum in the position of the sodium lines.
Page 94 - I obtained a tolerably bright solar spectrum, and brought a flame coloured by sodium vapour in front of the slit. I then saw the dark lines D change into bright ones.