Question:
Which of the following equations represents a travelling wave ?
Correct Option: 1
Solution:
$\mathrm{y}=\mathrm{F}(\mathrm{x}, \mathrm{t})$
For travelling wave $y$ should be linear function of $\mathrm{x}$ and $\mathrm{t}$ and they must exist as $(\mathrm{x} \pm \mathrm{vt})$ $\mathrm{y}=A \sin (15 x-2 t) \rightarrow$ linear function in $\mathrm{x}$ and $\mathrm{t}$
Option (1) is correct.