Antinode

Definition

An antinode is a point in a standing wave where the amplitude of oscillation is at its maximum. Antinodes occur at positions where constructive interference occurs.

5 Must Know Facts For Your Next Test

1. Antinodes are located between nodes in a standing wave pattern.
2. In a vibrating string fixed at both ends, antinodes are the points that move the most.
3. The distance between two consecutive antinodes is half the wavelength ($\lambda/2$).
4. Antinodes result from the constructive interference of two waves with the same frequency and amplitude traveling in opposite directions.
5. In sound waves within a tube open at both ends, antinodes form at the open ends.

Review Questions

• Where do antinodes occur in a standing wave pattern?
• What is the distance between two consecutive antinodes?
• How do antinodes form as a result of wave interference?

Related terms

Node:

A point in a standing wave where there is no displacement due to destructive interference.

Wavelength:

The distance over which a wave's shape repeats, typically measured from crest to crest or trough to trough.

Standing Wave:

A wave that remains stationary, characterized by nodes and antinodes formed by the superposition of two traveling waves moving in opposite directions.