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Waves
Waves

Intensity-Amplitude Relation

I∝A2I \propto A^2

Intensity proportional to amplitude squared.

Variables

I
Intensity
Wave intensity
W/m²
A
Amplitude
Wave amplitude
m

Derivation

Energy ∝ A², power = energy/time ∝ A².

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Common questions

What is the Intensity-Amplitude Relation formula?

Intensity-Amplitude Relation is written I ∝A². Intensity proportional to amplitude squared. It belongs to Waves, under Wave Properties.

What are the units in I ∝A²?

In SI units, I is intensity, measured in kg/s³; A is amplitude, measured in m.

How is the Intensity-Amplitude Relation formula derived?

Energy ∝ A², power = energy/time ∝ A². The result is I ∝A².