A progressive wave travelling along the positive x-direction is represented by \[y\left( x,\text{ }t \right)=A\sin \]\[(kx-\omega t+\phi )\]. Its snapshot at \[t=0\]is given in the figure: |
For this wave, the phase \[\phi \]is : [JEE Main Held on 12-4-2019 Morning] |
A) \[0\]
B) \[-\frac{\pi }{2}\]
C) \[\pi \]
D) \[\frac{\pi }{2}\]
Correct Answer: C
Solution :
(c) |
\[y=A\sin (kx-wt+\phi )\] at \[x=0,t=0,y=0\] and slope is negative \[\Rightarrow \phi =\pi \] |
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