Abstract

<p>An investigation has been made of the extent to which the relative refractivity of the atmosphere is invariant under changes in pressure and humidity. To achieve the necessary precision a refractometer with double-passed chambers 14.3 m long was designed for use in the photographic region. No fiducial line is employed. The relative refractivity of dry air was found to vary by less than 3 × 10<sup>-6</sup> over the region from 3890 to 6440 Å for a change in pressure of ½ atm. The relative refractivity of water vapor at low pressure in the region from 3610 to 6440 Å was found to be</p><p>δ¯H<sub>2</sub>O=0.961646+0.0086062 <i>k</i><sup>2</sup>-0.00010547 <i>k</i><sup>4</sup>+0.00001312 <i>k</i><sup>6</sup>,</p><p>where <i>k</i> is the vacuum wave number in µ<sup>-1</sup>.</p>

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  1. H. Barrell and J. E. Sears, Phil. Trans. Roy. Soc. (London) A238, 1 (1940).
  2. Karl-Filip Svensson, Arkiv Fysik 16, 361 (1960).
  3. K. B. Newbound, J. Opt. Soc. Am. 39, 835 (1949).
  4. See dissertation, K. E. Erickson, the Johns Hopkins University (1961), for more complete details.
  5. V. P. Koronkevich, Optika i Spektroskopiia 1, 85 (1956).
  6. D. H. Rank, G. D. Saksena, and T. K. McCubbin, Jr., J. Opt. Soc. Am. 48, 455 (1958).
  7. See E. R. Peck, J. Opt. Soc. Am. 38, 1015 (1948).
  8. G. H. Dieke, D. Dimmock, and H. M. Crosswhite, J. Opt. Soc. Am. 46, 456 (1956).
  9. B. Edlén, J. Opt. Soc. Am. 43, 339 (1953).
  10. C. Cuthbertson and M. Cuthbertson, Phil. Trans. Roy. Soc. (London) A213, 16 (1914).
  11. J. Wüst and H. Reindel, Z. physik. Chem. B24, 155 (1934).
  12. For a discussion of other effects see W. F. Brown, Dielectrics, volume 17 of Handbook of Physics (Springer-Verlag, Berlin, 1956).

Barrell, H.

H. Barrell and J. E. Sears, Phil. Trans. Roy. Soc. (London) A238, 1 (1940).

Brown, W. F.

For a discussion of other effects see W. F. Brown, Dielectrics, volume 17 of Handbook of Physics (Springer-Verlag, Berlin, 1956).

Crosswhite, H. M.

G. H. Dieke, D. Dimmock, and H. M. Crosswhite, J. Opt. Soc. Am. 46, 456 (1956).

Cuthbertson, C.

C. Cuthbertson and M. Cuthbertson, Phil. Trans. Roy. Soc. (London) A213, 16 (1914).

Cuthbertson, M.

C. Cuthbertson and M. Cuthbertson, Phil. Trans. Roy. Soc. (London) A213, 16 (1914).

Dieke, G. H.

G. H. Dieke, D. Dimmock, and H. M. Crosswhite, J. Opt. Soc. Am. 46, 456 (1956).

Dimmock, D.

G. H. Dieke, D. Dimmock, and H. M. Crosswhite, J. Opt. Soc. Am. 46, 456 (1956).

Edlén, B.

B. Edlén, J. Opt. Soc. Am. 43, 339 (1953).

Erickson, K. E.

See dissertation, K. E. Erickson, the Johns Hopkins University (1961), for more complete details.

Koronkevich, V. P.

V. P. Koronkevich, Optika i Spektroskopiia 1, 85 (1956).

McCubbin, Jr., T. K.

D. H. Rank, G. D. Saksena, and T. K. McCubbin, Jr., J. Opt. Soc. Am. 48, 455 (1958).

Newbound, K. B.

K. B. Newbound, J. Opt. Soc. Am. 39, 835 (1949).

Peck, E. R.

See E. R. Peck, J. Opt. Soc. Am. 38, 1015 (1948).

Rank, D. H.

D. H. Rank, G. D. Saksena, and T. K. McCubbin, Jr., J. Opt. Soc. Am. 48, 455 (1958).

Reindel, H.

J. Wüst and H. Reindel, Z. physik. Chem. B24, 155 (1934).

Saksena, G. D.

D. H. Rank, G. D. Saksena, and T. K. McCubbin, Jr., J. Opt. Soc. Am. 48, 455 (1958).

Sears, J. E.

H. Barrell and J. E. Sears, Phil. Trans. Roy. Soc. (London) A238, 1 (1940).

Svensson, Karl-Filip

Karl-Filip Svensson, Arkiv Fysik 16, 361 (1960).

Wüst, J.

J. Wüst and H. Reindel, Z. physik. Chem. B24, 155 (1934).

Other (12)

H. Barrell and J. E. Sears, Phil. Trans. Roy. Soc. (London) A238, 1 (1940).

Karl-Filip Svensson, Arkiv Fysik 16, 361 (1960).

K. B. Newbound, J. Opt. Soc. Am. 39, 835 (1949).

See dissertation, K. E. Erickson, the Johns Hopkins University (1961), for more complete details.

V. P. Koronkevich, Optika i Spektroskopiia 1, 85 (1956).

D. H. Rank, G. D. Saksena, and T. K. McCubbin, Jr., J. Opt. Soc. Am. 48, 455 (1958).

See E. R. Peck, J. Opt. Soc. Am. 38, 1015 (1948).

G. H. Dieke, D. Dimmock, and H. M. Crosswhite, J. Opt. Soc. Am. 46, 456 (1956).

B. Edlén, J. Opt. Soc. Am. 43, 339 (1953).

C. Cuthbertson and M. Cuthbertson, Phil. Trans. Roy. Soc. (London) A213, 16 (1914).

J. Wüst and H. Reindel, Z. physik. Chem. B24, 155 (1934).

For a discussion of other effects see W. F. Brown, Dielectrics, volume 17 of Handbook of Physics (Springer-Verlag, Berlin, 1956).

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