Historical Linguistics. a theory that accounts for shared features among languages or dialects by identifying these features as innovations that spread from their points of origin to the speech of contiguous areas.
- Compare family-tree theory.
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How to use wave theory in a sentence
The interference of light is one of the phenomena for which the wave theory offers the only satisfactory explanation.Physics | Willis Eugene Tower
In optics, he developed the wave theory, and his name is associated with the simple dispersion formula.
Likewise, he first proposed the wave theory of light; although it was Huygens who established it on its present foundation.A History of Science, Volume 2(of 5) | Henry Smith Williams
Huyghens sought to account for this phenomenon on the principles of the wave theory, and he succeeded in doing so.Six Lectures on Light | John Tyndall
As stated at the time, this discovery ushered in the darkest hour in the fortunes of the wave theory.Six Lectures on Light | John Tyndall
British Dictionary definitions for wave theory
the theory proposed by Huygens that light is transmitted by waves
any theory that light or other radiation is transmitted as waves: See electromagnetic wave
- Compare corpuscular theory
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012