Question

What is the SI unit of intensity?

Answer 1

1. Definition: Intensity however is characterized as the power operating on a body's surface per unit of area.
2. Intensity is denoted by “I”.
3. The S.I unit of intensity is $\mathrm{Watt}\mathrm{per}\mathrm{square}\mathrm{meter}(W/m^2)or\left({\mathrm{kgs}}^{-3}\right)$.
4. Formula: $\mathrm{I}=\mathrm{PA}$. Here, I is the intensity, P is the power, and A is the area.

Therefore, it is often used for waves, wherein situation the average power emitted by the wave during a given time period would be employed.