Two waves are propagating along a taut string that coincides with… - Vidyadip

MCQ

Two waves are propagating along a taut string that coincides with the $x-$axis. The first wave has the wave function $y_1 = A cos [k(x - vt)]$ and the second has the wave function $y = A cos [k(x + vt) + \phi ]$.

A
For constructive interference at $x = 0, \phi = \pi $.
B
For constructive interference at $x = 0, \phi = 3\pi .$
✓
For destructive interference at $x = 0, \phi = \pi$ .
D
For destructive interference at $x = 0, \phi = 2\pi$ .

✓

Answer

Correct option: C.

For destructive interference at $x = 0, \phi = \pi$ .

c

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