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 = \(\frac{\lambda T}{2t}\)
Verified Correct Answer: B.
Physical Principles & Numerical Solution
V = \(\frac{2d}{t}\)
f\(\lambda = \frac{2d}{t} = \frac{\lambda}{T} = \frac{2d}{t}\)
Source: Myschool Past Questions Archive (Record #35069)