Question

A source oscillates with a frequency `25 Hz` and the wave propagates with `300m//s`. Two points `A` and `B` are located at distances `10m and 16m` away from the source. The phase difference between `A and B` is
A. `(pi)/(4)`
B. `(pi)/(2)`
C. `pi`
D. `2pi`

Answer 1

Correct Answer - C
`Deltaphi = (2pi)/(lambda)(Deltax) = (2pi phi(Deltax))/(v)`, (as `lambda = (v)/(f)`)
`=((2pi)(25)(16 - 10))/(300) =pi`