Physics > 2008 > 33
WASSCE
A sound wave is produced from a source and an echo is heard t seconds afterwards. If d is the distance of the reflecting surface from the source, v the speed, λ the wavelength and T the period of the wave, then
A.
| d | = | 2t λ |
B.
| d | = | λt 2T |
C.
| d | = | 2T λt |
D.
| d | = | λT t |
Answer: B
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