$$ y(x,t) = A . Cos(k.x - \omega .t + \Phi ) $$

How the above equation is one-dimensional wave. Where at every value of $' x ' $ we get value of $ ' y ' $ where $ ' t ' $ is time. It should be two dimensional.

  • $\begingroup$ Dear @PM2Ring it is 1-D as a mathematical model? or how many dimensional .wave it is , because this wave equation shows the pattern of transverse wave and many examples are related to this. Why it is called one-Dimensional wave. $\endgroup$ – 123 May 28 at 4:54
  • 2
    $\begingroup$ $y$ is in general not a spatial coordinate like $x$. It is “whatever quantity is waving”. Only sometimes is the thing that is waving the displacement in a transverse direction, as for a vibrating string. When it is temperature or pressure or whatever it is not a coordinate. $\endgroup$ – G. Smith May 28 at 5:09

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