Stationary waves are formed when 2progressive waves with the samefrequency travelling in opposite directions superpose.
They do not transfer energy, they store it
Stationary waves are formed when two waves travelling in opposite directions with the same frequency + amplitude, reflected of a fixed end, superpose creating nodes and antinodes
Antinode: Point of maximum amplitude
Node: Point of zero amplitude
Between adjacent nodes all particles are in phase
Particles on different sides of a node are in antiphase (180 degrees out of phase)
Progressive Waves transfer energy in the direction of travel
Stationary waves - no energy is transferred, it is stored
Progressive waves the amplitude is constant
Stationary waves the amplitude varies across nodes-0 amplitude