\[I=\frac{P}{A}\]
Variables
Iwave intensity (W/m²)
Pwave power (W)
Aarea perpendicular to propagation (m²)
Description
What is this formula?
The Wave Intensity formula calculates the power transmitted by a wave per unit area perpendicular to its direction of propagation. It measures how much energy is transported through a given area every second.
When to use it
Use this formula when analyzing sound waves, water waves, seismic waves, electromagnetic waves, or energy transport through a surface.
Example
Given:
P = 50 W
A = 10 m²
Formula:
I = P/A
Substitution:
I = 50/10
I = 5 W/m²
Result:
I = 5 W/m²
Applications
Acoustics.
Optics.
Seismology.
Antenna systems.
Energy transmission analysis.