Antinode Node Antinode Node Node Antinode Solution There can

Solution

There can’t be true nodes as energy must flow from the mechanical oscillator or hand. Energy
is continually added to the string by the source, building up the amplitude of the
oscillation only at or near one of the natural frequencies of vibration. When the string
is excited at a frequency away from a natural frequency, the reflected waves reaching
the end of the string are not in phase with the external source, hence energy
can be transferred from the string back in to the mechanical oscillator or hand. The wave pattern is
not fixed but wiggles about.
Nodes occur at fixed locations and are at rest all the time in the string. As a result,
no energy is transported in any direction.The energy remains “standing” in the string as
energy is continually being transferred between elastic potential energy and vibrational
kinetic energy in the region between the nodes.