a sound wave is produced fron a source ans an echo is heard t seconds...

WAEC 2008

a sound wave is produced fron a source ans an echo is heard t seconds afterwards. If d is the distance of the reflecting surface from the source, v the speed, p the wavelength and T the period of the wave, then

A. d = \(\frac{2t}{\lambda}\)
B. d = \(\frac{\lambda t}{2T}\)
C. d = \(\frac{2T}{\lambda t}\)
D. d = \(\frac{\lambda T}{2t}\)

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Correct Answer: Option B

Explanation

V = \(\frac{2d}{t}\)

f\(\lambda = \frac{2d}{t} = \frac{\lambda}{T} = \frac{2d}{t}\)

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a sound wave is produced fron a source ans an echo is heard t seconds...

Correct Answer: Option B

Explanation

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