A standing wave. The red dots are the wave nodes

A node is a spatial locus along a standing wave where the wave has minimal amplitude. This has implications in several fields. For instance, in a guitar string, the ends of the string are nodes. By changing the position of one of these nodes through fretwork, the guitarist changes the effective length of the vibrating string and thereby the note played. The opposite of a node is an anti-node. Animation of a standing wave. ... The word locus (plural loci) is Latin for place: In biology and evolutionary computation, a locus is the position of a gene (or other significant sequence) on a chromosome. ... A standing wave, also known as a stationary wave, is a wave that remains in a constant position. ... Amplitude is a nonnegative scalar measure of a waves magnitude of oscillation, that is, magnitude of the maximum disturbance in the medium during one wave cycle. ... A guitar is a stringed musical instrument. ... Fretwork is an interlaced decorative design that is either carved in low relief on a solid background, or cut out with a fretsaw, jigsaw or scrollsaw. ... A vibration in a string is a wave. ...

There are two types of wave propagation: lateral and transverse. An example of the former is the guitar string. You can easily see the displacement nodes, because they have minimal amplitude. Light and other electromagnetic waves are examples of transverse waves, it is possible in transmission lines which have high standing wave ratios to observe voltage and current nodes and antinodes. A voltage node is a current antinode and a current node is a voltage antinode. For example at the tips of a dipole antenna voltage antinodes and current nodes exist. A light wave is an example of a transverse wave. ... The term displacement can have one of several meanings, depending on context: Displacement (distance), a physical quantity in kinematics Particle displacement, acoustics of sound in air Displacement (fluid), a different physical quantity, used in fluid mechanics and navigation; used as a measure of a ships size Engine displacement, a... Transmission lines in Lund, Sweden Electric power transmission is one process in the delivery of electricity to consumers. ... In telecommunication, standing wave ratio (SWR) is the ratio of the amplitude of a partial standing wave at an antinode (maximum) to the amplitude at an adjacent node (minimum). ... This article may be too technical for most readers to understand. ... The word current usually implies a flow or movement. ... A half-wave dipole Antenna being driven the naughty way with no balun between the coaxial cable and the dipole A dipole antenna is an antenna with two driven elements. ...

An example of a transverse wave is sound. With a transverse wave, the amplitude extends in transverse direction, so in the direction of wave propagation. There also exist standing transverse waves, in a flute, for example. The air in the flute moves back and forth, but it doesn't move at the closed end. Only the pressure changes there. This is a node, again. The open end of a flute is an antinode, because the air displacement is the largest here. When you change the way you blow the flute, you might hear a sound higher than the original. Now you have a node somewhere inside the flute. The air moves to and from this point, so at the node itself only the pressure changes.

In this flute, you could also interpret the nodes to be antinodes and vice-versa. This is when you look at the pressure. The pressure does not change at a node (although a lot of air passes there) and the pressure changes the most at an antinode (the closed end of the flute).

In chemistry, quantum mechanical waves, or "orbitals", are used to discribe the wave-like properties of electrons. Many of these quantum waves have nodes as well. The number and position of these nodes give rise to many of the properties of an atom or bond. For example, bonding orbitals with small nodes solely around nuclei are very stable, and are known as "bonds". In contrast, bonding orbitals with large nodes between nuclei will not be stable due to electrostatic repulsion and are known as "anti-bonding orbitals" because they will be so unstable as to cause a bond to break. It is due to this that the noble gases will not form bonds between other noble spaces. Fig. ...