All the joints are nearby antinodes of standing wave in the ring, which indicates that more electromagnetic wave from straight MIM waveguide I can couple into the ring cavity and enter into the straight MIM waveguide II.
In Figure 4, one can find that the typical standing wave patterns formed in the ring and the antinode number inside the ring are even, which suggests that these wavelengths, respectively, correspond to the resonant modes for N = 2, 4, and 6.
The half waves have two free ends where the antinodes are at the ends and nodes are in the middle such that each half wave keep multiplying indefinitely to complete whole wavelengths where C = f X.
Electro and magnetic waves expand into larger waves from the antinodes (displacement) energy of standing waves at twice the wave amplitude of the smaller wave giving distance to the field.
Thus, the curves of Figure 3 provide the numbers (28, 27.8), (17, 28.2), (12, 28.0), (10, 27.9), (8, 29.5), (7, 24.0), indicating that the six highest modes contain 28, 17, 12, 10, 8, and 7 antinodes
With a rate input, the positions of the nodes and antinodes
move around the cylinder wall in the opposite direction to the direction of rotation (Coriolis acceleration).
During vibrations, each pattern of strutting system characteristically has nodes and antinodes
at various locations on the body of the guitar.
A superposition of incoming and reflected waves (either longitudinal or transverse) often forming a regular series of nodes (e.g., low motion points) interspersed with antinodes
(e.g., high motion points).
In case of fundamental wavelength there is an antinode
in the middle of the pipe length where the displacement amplitude is maximal.
In order to obtain the best possible response, the excitation should be localized in the neighborhood of the antinode
of the mode under investigation.