Abstract

The wave-lengths of 26 visible and ultraviolet radiations from H80198g have been measured to eight figures relative to 5460.7532A, provisionally adopted for the green line. A water-cooled electrodeless lamp containing two milligrams of artificial H80198g served as a light source when excited with radio waves of 100 Mc frequency. This lamp illuminated a Fabry-Perot interferometer and a large quartz spectrograph with which the interference patterns were photographed. Measurements of these patterns yielded relative wave-lengths with probable errors usually less than 0.0001A. In addition to demonstrating that H80198g 5460.7532A provides a practically perfect primary standard of length, this paper presents preliminary values of 27 superior spectroscopic standards which show that differences among vacuum wave numbers recur within the accuracy of the measurements, and that all the existing dispersion curves for air are incorrect.

© 1950 Optical Society of America

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  1. W. F. Meggers, J. Opt. Soc. Am. 38, 7 (1948).
    [CrossRef] [PubMed]
  2. W. F. Meggers, Comptes Rendus des Séances, Neuvième Conférence Générale des Poids et Mesures, 1948, 75.
  3. H. Barrell and J. Puttock, Comptes Rendus des Séances Neuvième Conférence Générale des Poids et Mesures, 1948, 77.
  4. A. Perard and J. Terrien, Comptes Rendus 228, 964 (1949).
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    [CrossRef]
  6. J. M. Blank, J. Opt. Soc. Am. 40, 345 (1950).
    [CrossRef]
  7. C. Fabry and H. Buisson, Astrophys. J. 28, 169 (1908).
    [CrossRef]
  8. W. F. Meggers and C. J. Humphreys, J. Research Nat. Bur. Stand. 18, 543 (1937).
    [CrossRef]
  9. F. H. Rolt and H. Barrell, Proc. Roy. Soc. A122, 122 (1929).
    [CrossRef]
  10. W. F. Meggers, Sci. Monthly 68, 3 (1949).
  11. G. R. Harrison, M.I.T. Wave-length Tables (John Wiley and Sons, Inc., New York).
  12. W. F. Meggers and C. G. Peters, Bur. Stand. Sci. Papers 14, 724 (1918).
  13. H. Kayser and C. Runge, Wiedem. Ann. 52, 93 (1894).
    [CrossRef]
  14. W. F. Meggers, Astrophys. J. 60, 60 (1924).
    [CrossRef]
  15. K. Burns, J. Opt. Soc. Am. and Rev. Sci. Inst. 11, 301 (1925).
    [CrossRef]
  16. J. E. Sears and H. Barrell, Phil. Trans. Roy. Soc. (London) A238, 1 (1939).
  17. A. Pérard, Trans. Bur. int. Poids et Mesures 19, 78 (1934).
  18. W. Kösters and P. Lampe, Physik. Zeits. 35, 223 (1934).

1950 (2)

W. F. Meggers and F. O. Westfall, J. Research, Nat. Bur. Stand. 44, 447 (1950).
[CrossRef]

J. M. Blank, J. Opt. Soc. Am. 40, 345 (1950).
[CrossRef]

1949 (2)

W. F. Meggers, Sci. Monthly 68, 3 (1949).

A. Perard and J. Terrien, Comptes Rendus 228, 964 (1949).

1948 (3)

W. F. Meggers, J. Opt. Soc. Am. 38, 7 (1948).
[CrossRef] [PubMed]

W. F. Meggers, Comptes Rendus des Séances, Neuvième Conférence Générale des Poids et Mesures, 1948, 75.

H. Barrell and J. Puttock, Comptes Rendus des Séances Neuvième Conférence Générale des Poids et Mesures, 1948, 77.

1939 (1)

J. E. Sears and H. Barrell, Phil. Trans. Roy. Soc. (London) A238, 1 (1939).

1937 (1)

W. F. Meggers and C. J. Humphreys, J. Research Nat. Bur. Stand. 18, 543 (1937).
[CrossRef]

1934 (2)

A. Pérard, Trans. Bur. int. Poids et Mesures 19, 78 (1934).

W. Kösters and P. Lampe, Physik. Zeits. 35, 223 (1934).

1929 (1)

F. H. Rolt and H. Barrell, Proc. Roy. Soc. A122, 122 (1929).
[CrossRef]

1925 (1)

K. Burns, J. Opt. Soc. Am. and Rev. Sci. Inst. 11, 301 (1925).
[CrossRef]

1924 (1)

W. F. Meggers, Astrophys. J. 60, 60 (1924).
[CrossRef]

1918 (1)

W. F. Meggers and C. G. Peters, Bur. Stand. Sci. Papers 14, 724 (1918).

1908 (1)

C. Fabry and H. Buisson, Astrophys. J. 28, 169 (1908).
[CrossRef]

1894 (1)

H. Kayser and C. Runge, Wiedem. Ann. 52, 93 (1894).
[CrossRef]

Barrell, H.

H. Barrell and J. Puttock, Comptes Rendus des Séances Neuvième Conférence Générale des Poids et Mesures, 1948, 77.

J. E. Sears and H. Barrell, Phil. Trans. Roy. Soc. (London) A238, 1 (1939).

F. H. Rolt and H. Barrell, Proc. Roy. Soc. A122, 122 (1929).
[CrossRef]

Blank, J. M.

Buisson, H.

C. Fabry and H. Buisson, Astrophys. J. 28, 169 (1908).
[CrossRef]

Burns, K.

K. Burns, J. Opt. Soc. Am. and Rev. Sci. Inst. 11, 301 (1925).
[CrossRef]

Fabry, C.

C. Fabry and H. Buisson, Astrophys. J. 28, 169 (1908).
[CrossRef]

Harrison, G. R.

G. R. Harrison, M.I.T. Wave-length Tables (John Wiley and Sons, Inc., New York).

Humphreys, C. J.

W. F. Meggers and C. J. Humphreys, J. Research Nat. Bur. Stand. 18, 543 (1937).
[CrossRef]

Kayser, H.

H. Kayser and C. Runge, Wiedem. Ann. 52, 93 (1894).
[CrossRef]

Kösters, W.

W. Kösters and P. Lampe, Physik. Zeits. 35, 223 (1934).

Lampe, P.

W. Kösters and P. Lampe, Physik. Zeits. 35, 223 (1934).

Meggers, W. F.

W. F. Meggers and F. O. Westfall, J. Research, Nat. Bur. Stand. 44, 447 (1950).
[CrossRef]

W. F. Meggers, Sci. Monthly 68, 3 (1949).

W. F. Meggers, Comptes Rendus des Séances, Neuvième Conférence Générale des Poids et Mesures, 1948, 75.

W. F. Meggers, J. Opt. Soc. Am. 38, 7 (1948).
[CrossRef] [PubMed]

W. F. Meggers and C. J. Humphreys, J. Research Nat. Bur. Stand. 18, 543 (1937).
[CrossRef]

W. F. Meggers, Astrophys. J. 60, 60 (1924).
[CrossRef]

W. F. Meggers and C. G. Peters, Bur. Stand. Sci. Papers 14, 724 (1918).

Perard, A.

A. Perard and J. Terrien, Comptes Rendus 228, 964 (1949).

Pérard, A.

A. Pérard, Trans. Bur. int. Poids et Mesures 19, 78 (1934).

Peters, C. G.

W. F. Meggers and C. G. Peters, Bur. Stand. Sci. Papers 14, 724 (1918).

Puttock, J.

H. Barrell and J. Puttock, Comptes Rendus des Séances Neuvième Conférence Générale des Poids et Mesures, 1948, 77.

Rolt, F. H.

F. H. Rolt and H. Barrell, Proc. Roy. Soc. A122, 122 (1929).
[CrossRef]

Runge, C.

H. Kayser and C. Runge, Wiedem. Ann. 52, 93 (1894).
[CrossRef]

Sears, J. E.

J. E. Sears and H. Barrell, Phil. Trans. Roy. Soc. (London) A238, 1 (1939).

Terrien, J.

A. Perard and J. Terrien, Comptes Rendus 228, 964 (1949).

Westfall, F. O.

W. F. Meggers and F. O. Westfall, J. Research, Nat. Bur. Stand. 44, 447 (1950).
[CrossRef]

Astrophys. J. (2)

C. Fabry and H. Buisson, Astrophys. J. 28, 169 (1908).
[CrossRef]

W. F. Meggers, Astrophys. J. 60, 60 (1924).
[CrossRef]

Bur. Stand. Sci. Papers (1)

W. F. Meggers and C. G. Peters, Bur. Stand. Sci. Papers 14, 724 (1918).

Comptes Rendus (1)

A. Perard and J. Terrien, Comptes Rendus 228, 964 (1949).

Comptes Rendus des Séances Neuvième Conférence Générale des Poids et Mesures (1)

H. Barrell and J. Puttock, Comptes Rendus des Séances Neuvième Conférence Générale des Poids et Mesures, 1948, 77.

Comptes Rendus des Séances, Neuvième Conférence Générale des Poids et Mesures (1)

W. F. Meggers, Comptes Rendus des Séances, Neuvième Conférence Générale des Poids et Mesures, 1948, 75.

J. Opt. Soc. Am. (2)

J. Opt. Soc. Am. and Rev. Sci. Inst. (1)

K. Burns, J. Opt. Soc. Am. and Rev. Sci. Inst. 11, 301 (1925).
[CrossRef]

J. Research Nat. Bur. Stand. (1)

W. F. Meggers and C. J. Humphreys, J. Research Nat. Bur. Stand. 18, 543 (1937).
[CrossRef]

J. Research, Nat. Bur. Stand. (1)

W. F. Meggers and F. O. Westfall, J. Research, Nat. Bur. Stand. 44, 447 (1950).
[CrossRef]

Phil. Trans. Roy. Soc. (London) (1)

J. E. Sears and H. Barrell, Phil. Trans. Roy. Soc. (London) A238, 1 (1939).

Physik. Zeits. (1)

W. Kösters and P. Lampe, Physik. Zeits. 35, 223 (1934).

Proc. Roy. Soc. (1)

F. H. Rolt and H. Barrell, Proc. Roy. Soc. A122, 122 (1929).
[CrossRef]

Sci. Monthly (1)

W. F. Meggers, Sci. Monthly 68, 3 (1949).

Trans. Bur. int. Poids et Mesures (1)

A. Pérard, Trans. Bur. int. Poids et Mesures 19, 78 (1934).

Wiedem. Ann. (1)

H. Kayser and C. Runge, Wiedem. Ann. 52, 93 (1894).
[CrossRef]

Other (1)

G. R. Harrison, M.I.T. Wave-length Tables (John Wiley and Sons, Inc., New York).

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Tables (2)

Tables Icon

Table I Preliminary values of H 80 198 g wave-lengths relative to H 80 198 g 5460.7532 in normal air.

Tables Icon

Table II Principal lines and terms of H 80 198 g I.