Abstract

A method of measuring the refractive indexes of liquids in the infrared is described. A Perkin-Elmer spectrometer is adapted for this purpose without interfering with its normal operation as a routine instrument. Although use is made of a Fabry-Perot etalon, the method is not interferometric in the accepted sense. The accuracy that has been obtained is 0.002 at a wavelength of 1µ, but in principle the possible accuracy of the method may be equal to that of the best goniometer.

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  1. Y. K. Syrkin and M. E. Dyatkina, Structure of Molecules and the Chemical Bond (translated from Russian)(Interscience Publishers, Inc., London, 1950), p. 204.
  2. J. H. Van Vleck, The Theory of Electric and Magnetic Susceptibilities (Oxford University Press, London, 1932), p. 42.
  3. H. Rubens, Pogg. Ann. 45, 238 (1892).
  4. A. H. Pfund, J. Opt. Soc. Am. 25, 351 (1935).
  5. M. A. Pittman, J. Opt. Soc. Am. 29, 358 (1939).
  6. J. Vincent-Geisse, Compt. rend. 224, 650 (1947).
  7. K. B. Everard et al., Trans. Faraday Soc. 46, 417 (1950).
  8. A. Weissberger, Physical Methods of Organic Chemistry (Interscience Publishers, Inc., New York, 1945), Vol. 1, p. 729.
  9. G. Wiedmann and W. Schmidt, Z. Physik 106, 273 (1937).
  10. R. B. Barnes and M. Czerny, Phys. Rev. 38, 338 (1931).
  11. J. W. Ellis, J. Opt. Soc. Am. 23, 88 (1933).
  12. S. Tolansky, Phil. Mag. 34, 555 (1943).

Barnes, R. B.

R. B. Barnes and M. Czerny, Phys. Rev. 38, 338 (1931).

Czerny, M.

R. B. Barnes and M. Czerny, Phys. Rev. 38, 338 (1931).

Dyatkina, M. E.

Y. K. Syrkin and M. E. Dyatkina, Structure of Molecules and the Chemical Bond (translated from Russian)(Interscience Publishers, Inc., London, 1950), p. 204.

Ellis, J. W.

J. W. Ellis, J. Opt. Soc. Am. 23, 88 (1933).

Everard, K. B.

K. B. Everard et al., Trans. Faraday Soc. 46, 417 (1950).

Pfund, A. H.

A. H. Pfund, J. Opt. Soc. Am. 25, 351 (1935).

Pittman, M. A.

M. A. Pittman, J. Opt. Soc. Am. 29, 358 (1939).

Rubens, H.

H. Rubens, Pogg. Ann. 45, 238 (1892).

Schmidt, W.

G. Wiedmann and W. Schmidt, Z. Physik 106, 273 (1937).

Syrkin, Y. K.

Y. K. Syrkin and M. E. Dyatkina, Structure of Molecules and the Chemical Bond (translated from Russian)(Interscience Publishers, Inc., London, 1950), p. 204.

Tolansky, S.

S. Tolansky, Phil. Mag. 34, 555 (1943).

Van Vleck, J. H.

J. H. Van Vleck, The Theory of Electric and Magnetic Susceptibilities (Oxford University Press, London, 1932), p. 42.

Vincent-Geisse, J.

J. Vincent-Geisse, Compt. rend. 224, 650 (1947).

Weissberger, A.

A. Weissberger, Physical Methods of Organic Chemistry (Interscience Publishers, Inc., New York, 1945), Vol. 1, p. 729.

Wiedmann, G.

G. Wiedmann and W. Schmidt, Z. Physik 106, 273 (1937).

Other (12)

Y. K. Syrkin and M. E. Dyatkina, Structure of Molecules and the Chemical Bond (translated from Russian)(Interscience Publishers, Inc., London, 1950), p. 204.

J. H. Van Vleck, The Theory of Electric and Magnetic Susceptibilities (Oxford University Press, London, 1932), p. 42.

H. Rubens, Pogg. Ann. 45, 238 (1892).

A. H. Pfund, J. Opt. Soc. Am. 25, 351 (1935).

M. A. Pittman, J. Opt. Soc. Am. 29, 358 (1939).

J. Vincent-Geisse, Compt. rend. 224, 650 (1947).

K. B. Everard et al., Trans. Faraday Soc. 46, 417 (1950).

A. Weissberger, Physical Methods of Organic Chemistry (Interscience Publishers, Inc., New York, 1945), Vol. 1, p. 729.

G. Wiedmann and W. Schmidt, Z. Physik 106, 273 (1937).

R. B. Barnes and M. Czerny, Phys. Rev. 38, 338 (1931).

J. W. Ellis, J. Opt. Soc. Am. 23, 88 (1933).

S. Tolansky, Phil. Mag. 34, 555 (1943).

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