. Carnegie Institution of Washington publication. ,50 I I .51 20 20JOO —10. I I FIG. 15. .49 .50 .51 FIG. 16. 4: 20 20JOO —15 —10 agency. On the other hand, if each band is dne to some process going on in one particular compound or molecular aggre- gation, wave-lengths might be found which would excite one band and not the rest, or which would at any rate excite the bands in different degree. To test this matter we have measured the distribution of intensity in the bands for excitation by different lines in the ultra-violet spectrum of the quartz mercury lamp. The intensity of fluo- rescence w
. Carnegie Institution of Washington publication. ,50 I I .51 20 20JOO —10. I I FIG. 15. .49 .50 .51 FIG. 16. 4: 20 20JOO —15 —10 agency. On the other hand, if each band is dne to some process going on in one particular compound or molecular aggre- gation, wave-lengths might be found which would excite one band and not the rest, or which would at any rate excite the bands in different degree. To test this matter we have measured the distribution of intensity in the bands for excitation by different lines in the ultra-violet spectrum of the quartz mercury lamp. The intensity of fluo- rescence with this excitation is not suffi- cient to permit the measurement of all the bands, so that the three brightest bands only have been measured. In table 11 the intensities for excitation by the different lines in the mer- cury spectrum are given for five different uranyl salts. Curves show- ing the variation of the relative intensity with the wave-length of the exciting light are shown for uranyl-nitrate crystals in figure 18, and for the double sulphate in figure 19. In each case the intensity of the most intense band has been put equal to 10. The variation was greater in the case of the double sulphate than in the case of any other salt studied. The observations were repeated in the case of this sub- stance on two different days and a comparison of the full and dotted. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
Size: 2158px × 1158px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1900, bookyear1902
