Given below are some functions of $x$ and $t$ to represent the displacement (transverse or longitudinal) of an elastic wave. State which of these represent a travelling wave
Given below are some functions of $x$ and $t$ to represent the displacement (transverse or longitudinal) of an elastic wave. State which of these represent a travelling wave
- A
$y = 2\,cos\,(3x)\,sin\,(10t)$
- B
$y = 2\,\sqrt {x - vt}$
- C
$y = 3\,sin\,(5x -0.5t) + 4\,cos\,(5x -0.5t)$
- D
$y = cos\,x\,sin\,t + cos\,2x\,sin\,2t$
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