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A plane progessive wave of frequency 25 ...

A plane progessive wave of frequency `25 Hz`, amplitude `2.5 xx 10^-5 m` and initial phase zero propagates along the negative x-direction with a velocity of `300 m//s`. At any instant, the phase difference between the oscillations at two points `6 m` apart the line of propagation is _____ .

A

A=0

B

`phi=0`

C

`A = 2.5 xx 10^(-5) m`

D

`phi = pi`

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The correct Answer is:
A, D
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