A contour map without heights marked on the lines is of little value, but we have discovered that by using multiple wavelength narrowband detection we can recognize the order of the standing wave antinodes
by their colours and so tell the difference between hills and valleys.
Ultrasonic devices oscillate files at 25-30 kHz, producing nodes and antinodes
along the file, whereas sonic devices such as EA operate at lower frequencies of about 1000 to 6000 Hz, so only one node and antinode
occur near the tip (17,18).
In the end, those crazy kids at fashion week are the peaks or antinodes
in a standing wave, while all of us normal-looking civilians are nodes in the same wave.
In addition, in tandem devices both the emitting layers are located at the two antinodes
so as to take the benefit of increased light output from the microcavity effect [12-15].
The measured points are the antinodes
with the largest amplitude.
The ends of the tubes are not exact nodes and antinodes
. It can be a useful experiment to investigate the wave behaviour at the ends of the tube using the microphone.
Since the SSI was expected to modify the modal content of the cable, the output locations were chosen on or nearby the antinodes
of the first three modes.
In the last years, the attention of the community has been focusing on three main experimental facts : the dramatic change in shape and nature of the Fermi surface between underdoped and overdoped regimes, the appearance of a psedudogap in the underdoped regime, and the striking differentiation between the physics at the nodes and at the antinodes
in the pseudogap regime.
The leaked signal from an amplifier will always have "antinodes
" at specific sites where that signal is at its greatest amplitude, and "nodes" where it has no amplitude at all.
It is well known that the amplitude ratio of forward and backward propagating mode determines the amplitude of the antinodes
. Therefore it is ensured that the profile of the perturbation would determine the amount of localized SP.
The modes [E.sup.x.sub.pq] (p, q = 1, 2, 3 ...; p and q denote the number of antinodes
of the electric field in the x and y direction, respectively), where the electric field is polarized mainly along the x direction, are equivalent to TE modes in Fig.