摘要:

A consideration of the transmission of longitudinal sound waves down a fluid-filled tube indicates that anomalous dispersion of the wave may or may not occur at the frequency of radial resonance of the liquid column. In this paper it is shown that the criterion is the rigidity of the tube wall, as radial vibrations will ordinarily appear under the influence of a longitudinal sound wave only when the wall is able to respond appreciably to the alternating pressure occurring in the fluid.

ISSN:1923-4287    

DOI:10.1139/cjr39a-017

出版商:NRC Research Press    

年代:1939

数据来源: NRC

摘要:

An experimental procedure is described for using the quartz crystal light modulator as an instrument for measuring very small optical rotations of the plane of polarization. The accuracy of the measurement is of the order of 10 sec. of arc, and the method is capable of still greater precision.An elementary analysis of the crystal behaviour explains the fundamental and second harmonic components of light intensity present in the modulated beam of light.

ISSN:1923-4287    

DOI:10.1139/cjr39a-018

出版商:NRC Research Press    

年代:1939

数据来源: NRC