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ALKALI METAL FILMS TRANSPARENT IN THE SCHUMANN REGION |
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Canadian Journal of Research,
Volume 14a,
Issue 8,
1936,
Page 153-157
W. H. Watson,
D. G. Hurst,
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摘要:
Sodium and potassium films deposited from a molecular beam on fluorite at liquid air temperature have been found to be transparent in the Schumann region. For λ > 1400 Å no transparency has been found in the case of lithium. A technique for producing these films is described. The theoretical bearing of these results is discussed.
ISSN:1923-4287
DOI:10.1139/cjr36a-017
出版商:NRC Research Press
年代:1936
数据来源: NRC
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2. |
INTENSITY MEASUREMENTS IN THE DIFFRACTION OF LIGHT BY ULTRASONIC WAVES |
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Canadian Journal of Research,
Volume 14a,
Issue 8,
1936,
Page 158-171
F. H. Sanders,
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摘要:
Measurements of the distribution of light energy among the various orders of the diffraction pattern produced when monochromatic light is passed through a liquid subjected to high-frequency ultrasonic disturbances have been carried out over a range of ultrasonic intensities at frequencies in the region of 5 megacycles per second. Both progressive and standing wave fields have been studied. Results of the experiments show excellent agreement with the theory of Raman and Nath for the variation in degree of scattering with varying ultrasonic intensity. Absolute measurements of the sound intensity conducted with a torsion pendulum are in good agreement with that expected from the theory for the liquids and light wave-lengths involved.
ISSN:1923-4287
DOI:10.1139/cjr36a-018
出版商:NRC Research Press
年代:1936
数据来源: NRC
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