| Unit | Depends on the quantity that oscillates |
|---|---|
| Do not confuse with | Frequency |
| Requires | A reference position or value |
Definition and context
Amplitude indicates the size of a variation in an oscillatory model. On a rope, it can describe the maximum displacement from the equilibrium position. In other phenomena, it may refer to pressure, an electric field, or another quantity; therefore, its unit depends on what is oscillating.
A wave with greater amplitude does not necessarily have a higher frequency. We can draw two oscillations that repeat equally quickly but reach different heights. The energy transported depends on specific relationships within the system. For an ideal rope under fixed conditions, there is a quadratic dependence on amplitude, but it is not advisable to extend that formula without examining the model and the phenomenon we are describing.
What we know and its limits
Introductory reference sheet. Properties and applications depend on measurement conditions; consult the sources before making comparisons.
Follow the evidence
The original sources for exploring this explanation and its limits.
- University Physics Volume 1 · Energy and Power of a Wave
OpenStax · Rice University
Energy transfer and power in mechanical waves.
Image credits
SciClue · AI-generated illustration (OpenAI) · Original source · Recurso editorial de SciClue · generado con IA