antinode
Definition
Noun: - (Physics): The point in a standing wave system where the amplitude of oscillation is at its maximum. It is the position of greatest displacement from the equilibrium or rest position.
Usage
The term "antinode" is used exclusively in the context of wave physics to describe a specific, measurable point in a standing wave pattern. It is always contrasted with a "node," which is a point of minimum or zero displacement.
Examples
- In a vibrating guitar string, the antinodes are the points that move the farthest up and down.
- The experiment clearly showed bright bands at the antinodes of the light wave.
- To find the wavelength, measure the distance between two consecutive antinodes.
Advanced Usage
- "Pressure antinode": In a sound wave within a pipe, a pressure antinode is a point of maximum pressure variation. This is complementary to a displacement node.
- The concept is fundamental in understanding resonance in musical instruments, antenna design, and quantum mechanics (e.g., probability waves).
Variants and Related Words
- Node (noun): The point in a standing wave with the minimum amplitude (zero displacement in a perfect system). Nodes and antinodes alternate.
- Standing wave (noun): A wave pattern that remains in a constant position, created by the interference of two waves traveling in opposite directions. It is characterized by its nodes and antinodes.
Synonyms
- Point of maximum amplitude
- Loop (in the context of a transverse standing wave, the antinode is at the center of a loop)
Antonyms
- Node: The point of minimum amplitude in a standing wave.
Noun
-
(physics) the point of maximum displacement in a periodic system
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