Phys. Rev. 47, 735 - 738 (1935)Equation of a Wave in a Medium with Velocity a Function of Time |
P. I. Wold
Union College, Schenectady
Received 18 February 1935
The equation of a wave in a medium for which the velocity is a function of time is obtained. On purely physical considerations for the case of v=v0e-αt and a simple periodic oscillation at the source, the equation is y=a sin 2πν0[t-(1 / α) ln (1+(αx / c)eαt)]. From other considerations the differential equation obtained is y¨+αẏ=c2e-2αty′′ which is satisfied by the equation above.
©1935 The American Physical Society
URL: http://link.aps.org/abstract/PR/v47/p735
DOI: 10.1103/PhysRev.47.735
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