Question

When stationary waves are set up, pick out the correct statement from the following:

• A. all the particles in the medium are in the same phase of vibration at all times and distances
• B. the particles with an interval between two consecutive nodes are in phase, but the particles in two such consecutive intervals, are of opposite phase
• C. the phase lag along the path of the wave increases as the distance from the source increases
• D. only antinodes are in same phase

Answer 1

The correct option is B the particles with an interval between two consecutive nodes are in phase, but the particles in two such consecutive intervals, are of opposite phase

A stationary waves is formed when two waves of same frequency but travelling in apposite direction interfere.
$Y=2A\sin kx\cos \omega t.$
between two nodes , all the particles will be in phase