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 increase
• D. only antinodes are in same phase

Answer 1

Answer: (B)

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