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Science 9 August 1968:
Vol. 161. no. 3841, pp. 567 - 569
DOI: 10.1126/science.161.3841.567
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Articles

The Effect of Mass on Frequency

Dror Sadeh 1, Stephen Knowles 1, and Benjamin Au 1

1 E. O. Hulburt Center For Space Research, Naval Research Laboratory, Washington, D.C. 20390

Two experiments are described where an apparent decrease in frequency was detected when the optical path was in the vicinity of a mass. In the first experiment the 21-centimeter absorption line from Taurus A was observed near occultation by the sun. In the second experiment the frequency of a portable cesium clock was compared with the frequency of a similar clock which transmits its signals from Cape Fear, North Carolina. A decrease of frequency of the received signals as a function of the distance between the two clocks was apparent. Several relevant observations (the red shift of lines from the sun, the Mossbauer determination of the gravitational red shift, and the cosmological red shif) are discussed in view of the present results. confirmation.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Search for an Effect of the Sun on the Frequency of 18-Centimeter Radiation.
J. A. Ball, D. F. Dickinson, A. E. Lilley, H. Penfield, and I. I. Shapiro (1970)
Science 167, 1755-1757
   PDF »
Nondependence of Frequency on Mass: A Differential Experiment.
W. Markowitz (1968)
Science 162, 1387-1388
   Abstract »    PDF »


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