Abstract

Air-flow birefringence in normal conditions of pressure and temperature is experimentally proved. Measurements of the change of the polarization of a plane wave propagating through a boundary layer are displayed for both laminar and turbulent flow.

© 1975 Optical Society of America

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References

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  1. J. C. Maxwell, Proc. R. Soc. Lond. 22, 46 (1873).
    [Crossref]
  2. C. V. Raman and K. S. Krishnan, Philos. Mag. 5, 769 (1928).
  3. L. Waldmann, in Handbuch der Physik, Vol. 12, edited by S. Flügge (Springer, Berlin, 1958), p. 489.
  4. S. Hess, Phys. Lett. A 30, 239 (1969).
    [Crossref]
  5. F. Bass, Phys. Lett. A 36, 107 (1971).
    [Crossref]
  6. A. J. Robert, in SESA 1965, International Conference on Experimental Mechanics, Vol. 1 (SESA, Washington, 1965), pp. 123–131.

1971 (1)

F. Bass, Phys. Lett. A 36, 107 (1971).
[Crossref]

1969 (1)

S. Hess, Phys. Lett. A 30, 239 (1969).
[Crossref]

1928 (1)

C. V. Raman and K. S. Krishnan, Philos. Mag. 5, 769 (1928).

1873 (1)

J. C. Maxwell, Proc. R. Soc. Lond. 22, 46 (1873).
[Crossref]

Bass, F.

F. Bass, Phys. Lett. A 36, 107 (1971).
[Crossref]

Hess, S.

S. Hess, Phys. Lett. A 30, 239 (1969).
[Crossref]

Krishnan, K. S.

C. V. Raman and K. S. Krishnan, Philos. Mag. 5, 769 (1928).

Maxwell, J. C.

J. C. Maxwell, Proc. R. Soc. Lond. 22, 46 (1873).
[Crossref]

Raman, C. V.

C. V. Raman and K. S. Krishnan, Philos. Mag. 5, 769 (1928).

Robert, A. J.

A. J. Robert, in SESA 1965, International Conference on Experimental Mechanics, Vol. 1 (SESA, Washington, 1965), pp. 123–131.

Waldmann, L.

L. Waldmann, in Handbuch der Physik, Vol. 12, edited by S. Flügge (Springer, Berlin, 1958), p. 489.

Philos. Mag. (1)

C. V. Raman and K. S. Krishnan, Philos. Mag. 5, 769 (1928).

Phys. Lett. A (2)

S. Hess, Phys. Lett. A 30, 239 (1969).
[Crossref]

F. Bass, Phys. Lett. A 36, 107 (1971).
[Crossref]

Proc. R. Soc. Lond. (1)

J. C. Maxwell, Proc. R. Soc. Lond. 22, 46 (1873).
[Crossref]

Other (2)

A. J. Robert, in SESA 1965, International Conference on Experimental Mechanics, Vol. 1 (SESA, Washington, 1965), pp. 123–131.

L. Waldmann, in Handbuch der Physik, Vol. 12, edited by S. Flügge (Springer, Berlin, 1958), p. 489.

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Figures (4)

FIG. 1
FIG. 1

Sketch of the apparatus. Only the metallic sheet is in the tunnel. L, laser; C, beam expander; P, polarizer; Q, quarter-wave plate; S, Front-profiled metallic sheet; G, wind gradient direction; k , light direction of propagation; v , wind direction; F: movable slit (in the G direction); E, ellipsometer.

FIG. 2
FIG. 2

Experimental profile of the wind-speed distribution (normalized) along the G axis (see Fig. 1) for V0 = 11, 19, and 35 m/s (V0 is the wind speed out of the boundary layer), for laminar and turbulent conditions.

FIG. 3
FIG. 3

Dependence of Δn = n0ne (n0 and ne are ordinary and extraordinary indices) on the gradient of wind speed. Laminar case β = Δn/G = 0.5 × 10−14.

FIG. 4
FIG. 4

Dependence of Δn on the gradient of wind speed. Turbulent case β = 0.4 × 10−14.

Tables (1)

Tables Icon

TABLE I Reynolds number vs V0, the wind speed out of the boundary layer under laminar and turbulent conditions.

Equations (1)

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I = 1 2 I max [ 1 + cos 2 λ cos 2 ( ω t + 2 α ) ] ,