Mathematical formulas

Basic Physics

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Subjects
Basic Physics
Waves
Intensity of a wave

13. Waves

Intensity of a wave

Formula

I = \frac{P}{A}

For an isotropic point source

I = \frac{P}{4 π r ^{2}}

Related formulas

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Average power
$P_{med} = \frac{W}{Δ t}$
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Sound intensity
$I = \frac{P}{A}$
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