Two point sources of sound are kept at a separation of 10 cm. They vibrate in phase to produce waves of wavelength 5.0 cm. What would be the phase difference between the two waves arriving at a point 20 cm from one source (a) on the line joining the sources and (b) on the perpendicular bisector of the line joining the sources ?

Answer

A, B

Explanation

a. Given `/_\x=10cm, lamda=5.0 cm`
`rarr phi=(2pi)/lamda/_\eta`
`=(2pi)/5xx10=4pi`
So, phase difference is zero.
b. zero as the particle is in same phase because of having same path.