MCQ
Which of the following equations represents a travelling wave ?
- ✓$y=A \sin (15 x-2 t)$
- B$y=\operatorname{Ae}^{-x^{2}}(v t+\theta)$
- C$y=A e^{x} \cos (\omega t-\theta)$
- D$y=A \sin x \cos \omega t$
✓
Answer
Correct option: A.
$y=A \sin (15 x-2 t)$
a
$y = F ( x , t )$
$y = F ( x , t )$
For travelling wave $y$ should be linear function of $x$ and $t$ and they must exist as $(x \pm v t)$
$y = A \sin (15 x-2 t) \rightarrow$ linear function in $x$ and $t.$
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