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The equation of a wave is y =4 sin {(pi)...

The equation of a wave is y =4 `sin {(pi)/(2) (2t +(x)/(8))}` ,where y,x are in cm and time is in second .The phase difference between two positions of the same particles which are occupied at time interval of 0.4 s is

A

` 0.2 pi`

B

` 0.4 pi `

C

` 0.6 pi `

D

` 0.8 pi`

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The correct Answer is:
B
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