If T represents the time period of a wave, the time taken for one compression to cross a fixed point will be equal to .

T

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0.5 T

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2 T

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0.25 T

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Solution

The correct option is B $0.5 T$
The time taken by successive compressions and rarefactions to cross a fixed point is called the time period of the wave. Hence, one compression will cross a fixed point in time equal to half of time period.

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y = a_{o} sin (ω t - k x)

y

t

x = \frac{π}{2 k}

t = 0

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