The Spectroscope and Its Applications |
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Page 19
... examined the sunlight with the new arrangement , as Newton had done a century and a quarter before with the old one , than he found out that it was not at all as Newton had represented it . Newton told us in fact that the sunlight was ...
... examined the sunlight with the new arrangement , as Newton had done a century and a quarter before with the old one , than he found out that it was not at all as Newton had represented it . Newton told us in fact that the sunlight was ...
Page 35
... examine the spectrum of an object we E p ' P $ 12 $ 10 F FIG . 19. - Direct - vision prism with five prisms . no longer have to look at it at an angle . No doubt you recollect the angle that was made by the light the moment it left the ...
... examine the spectrum of an object we E p ' P $ 12 $ 10 F FIG . 19. - Direct - vision prism with five prisms . no longer have to look at it at an angle . No doubt you recollect the angle that was made by the light the moment it left the ...
Page 38
... for instance , + E C FIG . 20 .-- Electric lamp . we take a platinum wire and heat it to redness , and examine by means of the spectroscope the light emitted , we shall find that only red rays are 38 [ LECT . THE SPECTROSCOPE.
... for instance , + E C FIG . 20 .-- Electric lamp . we take a platinum wire and heat it to redness , and examine by means of the spectroscope the light emitted , we shall find that only red rays are 38 [ LECT . THE SPECTROSCOPE.
Page 41
... examining these coloured fires . If we examined such a light by means of the spectroscope , you might expect that we should . obtain the red end of the continuous spectrum ; that on burning green fire we should see the green portion of ...
... examining these coloured fires . If we examined such a light by means of the spectroscope , you might expect that we should . obtain the red end of the continuous spectrum ; that on burning green fire we should see the green portion of ...
Page 42
... examine the light by means of a spectroscope , we find that the light rays which they emit are located in different parts of the spectrum . In these instances , then , the spectra consist of lines which are located in different parts of ...
... examine the light by means of a spectroscope , we find that the light rays which they emit are located in different parts of the spectrum . In these instances , then , the spectra consist of lines which are located in different parts of ...
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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.