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A plane progressive wave of frequency 25 Hz, amplitude `2.5 xx 10^(-5)` m and initial phase zero moves along the negative x-direction with a velocity of 300 m`s^(-1)`. A and B are two points 6m apart on the iine of propagation of the wave. At any instant the phase difference between A and B is `theta`. The phase difference and path difference when the displacement of the particle at A and B is `triangle`, then
A. |
`theta=pi` |
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B. |
`theta=0` |
C. |
`triangle=0` |
D. |
`triangle=5xx10^(-10) m`` |