The Spectroscope and Its Applications |
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Page 2
... tell you candidly that I cannot , but there is this grain of caution connected with it which none of us should forget we may almost say for certain that Newton and his successors would have brought a great deal more out of the prism ...
... tell you candidly that I cannot , but there is this grain of caution connected with it which none of us should forget we may almost say for certain that Newton and his successors would have brought a great deal more out of the prism ...
Page 22
... tell their story . This is the explanation of the Fraunhofer lines in the solar spectrum . In the light which we get from the sun , certain of the rays which we may suppose ought to come to us , do not come , and we get no news from ...
... tell their story . This is the explanation of the Fraunhofer lines in the solar spectrum . In the light which we get from the sun , certain of the rays which we may suppose ought to come to us , do not come , and we get no news from ...
Page 50
... tell us merely what the gas or vapour experimented upon is ; it in fact tells us something of the physical condition of that gas or vapour , that is to say , whether it is very rare or whether it is very closely packed together ...
... tell us merely what the gas or vapour experimented upon is ; it in fact tells us something of the physical condition of that gas or vapour , that is to say , whether it is very rare or whether it is very closely packed together ...
Page 51
... tell you , for instance , that Kirchhoff and Bunsen have calculated that the 18 - millionth part of a grain can be determined by the spectroscope in the case of sodium ; that is to say , if in anything which I choose to examine by means ...
... tell you , for instance , that Kirchhoff and Bunsen have calculated that the 18 - millionth part of a grain can be determined by the spectroscope in the case of sodium ; that is to say , if in anything which I choose to examine by means ...
Page 91
... tell upon it ; and in this way , those particular vibrations which have had the work to do will be enfeebled . It is clear that the parts of the spectrum thus re- duced in brilliancy will depend upon the vapour through which the light ...
... tell upon it ; and in this way , those particular vibrations which have had the work to do will be enfeebled . It is clear that the parts of the spectrum thus re- duced in brilliancy will depend upon the vapour through which the light ...
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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.