File:Selective radiation from various solids (1908) (14583702647).jpg

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Identifier: select515919119089797unse (find matches)
Title: Selective radiation from various solids
Year: 1908 (1900s)
Authors:
Subjects: rays and radiation light reflection spectra
Publisher: National Bureau of Standards
Contributing Library: NIST Research Library
Digitizing Sponsor: NIST Research Library

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t 4.1 and 4.5/^, respectively. 4. Orthoclase ^ (Var. Adularia) (K Al Si^ Og).—(Rod, 8x2 mm.Energy supplied, 2.2 and 3.9 watts.) This substance emitted alittle more light than albite, although it was more transparent.The emission band at 2/x is prominent. The one at 2.9/x is shiftedfrom its position at 3.2//- in the absorption spectrum, from whichit would appear that the group of atoms causing the absorptionis different in the two cases. An examination of the transmissionspectrum, using polarized light, will be necessary to determine thetrue position of the absorption band. The bands at 4.1 and 4.5^^^are in common with the feldspars. 5. Beryl (Be^ AQ (Si O^^.—(Rod, 10 X 3 mm. Energy, 7 to8 watts. Curve a. Fig. 4.) The rod was an opalescent, milkyglass, although the original crystal was a transparent green. The ^ Transmission curves. Carnegie Publication, No. 65, p. 65.^ Transmission curves. Carnegie Publication, No. 65, p. 64. CobZeniz.) Selective Radiation from Various Solids. 167
Text Appearing After Image:
i68 Bulletin of the Bureau of Standards. ( Vol. 5, No. 2. apparent temperature was probably about iioo°. The emissionspectrum is unusual in appearance, with a sharp maximum super-posed upon it at 2.8/Lt. There appear to be other ill-definedmaxima at 1.7, 2.4, 2.9(?), 3.6, 4.4, and 4.8/>t, respectively. 6. Rutile)^ (Ti 0^.—(Flat plate, 8 mm long, tapering from 1.5to 1.8 mm wide and .25 mm thick. Energy supplied, 6 watts.Curve 6, Fig. 4.) This mineral was heated to a light red color 50 ,30 20 10 % i Fig. 4. (a) Beryl, Bes AI3 (Si 03)5 (b) Rutile, Ti O2 / \ t I V^ \ / ^ \ 1/ \ \ A y 1 \ xrVv 1 s^ \ \ 1 \ \ 1 V \N ^ / \ ^ 3 4 5 WAVE LENGTH 8/i corresponding to a temperature of perhaps 1000°. The terminalswere of copper melted to the rutile plate. The emission spectrumshows maxima at 2.4, 3.2, 5.5, and 7.0/x. The transmission spec-trum is too low to show these as absorption bands; but the bandat 3.1ft is visible in the transmission spectrum of brookite, Ti 0^.This substance is a goo

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https://www.flickr.com/photos/internetarchivebookimages/14583702647/

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Volume
InfoField
1908
Flickr tags
InfoField
  • bookid:select515919119089797unse
  • bookyear:1908
  • bookdecade:1900
  • bookcentury:1900
  • booksubject:rays_and_radiation
  • booksubject:light_reflection
  • booksubject:spectra
  • bookpublisher:National_Bureau_of_Standards
  • bookcontributor:NIST_Research_Library
  • booksponsor:NIST_Research_Library
  • bookleafnumber:12
  • bookcollection:NBSBulletin
  • bookcollection:NISTresearchlibrary
  • bookcollection:fedlink
  • bookcollection:americana
Flickr posted date
InfoField
28 July 2014


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