The Spectroscope and Its Applications |
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... already accorded , and for the many promises of support daily received , the Directors beg to assure those gentlemen who may favour them with their commands that no effort will be spared to secure and retain their fullest confidence and ...
... already accorded , and for the many promises of support daily received , the Directors beg to assure those gentlemen who may favour them with their commands that no effort will be spared to secure and retain their fullest confidence and ...
Page 4
... already alluded , were connected with prisms , and were based on well - known properties of light . If a beam of light , as for instance sunlight or an artificial white light , be allowed to enter a dark room from a round hole in a ...
... already alluded , were connected with prisms , and were based on well - known properties of light . If a beam of light , as for instance sunlight or an artificial white light , be allowed to enter a dark room from a round hole in a ...
Page 23
... already told you that dispersion is the measure of the difference of the refrangibilities . If we take a prism which appears like an ordinary one , but really is composed of several layers of dif- ferent kinds of glass , and pass an ...
... already told you that dispersion is the measure of the difference of the refrangibilities . If we take a prism which appears like an ordinary one , but really is composed of several layers of dif- ferent kinds of glass , and pass an ...
Page 26
... already alluded . But STEVENS FIG . 13. - Chemical or students ' spectroscope there is another consideration of great importance which comes in here . If the angle of a prism be large , a ray of light travelling from one prism to ...
... already alluded . But STEVENS FIG . 13. - Chemical or students ' spectroscope there is another consideration of great importance which comes in here . If the angle of a prism be large , a ray of light travelling from one prism to ...
Page 31
... already been explained ; after passing through the prism , in which the light . undergoes both deviation and dispersion , the spectrum FIG . 17. - Huggins's star spectroscope . is observed by the telescope on the left , which is simply ...
... already been explained ; after passing through the prism , in which the light . undergoes both deviation and dispersion , the spectrum FIG . 17. - Huggins's star spectroscope . is observed by the telescope on the left , which is simply ...
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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.