Question

The unit for measuring intensity of energy is__________

Answer 1

Intensity

1. Intensity is the amount of energy transferred by a wave per unit time over a unit area surface.
2. It is proportional to the wave speed multiplied by the energy density.

The formula for Intensity.

1. $\begin{array}{l}I=\frac{P}{A}\end{array}$

Where I = Intensity of energy,

P = Power,

A = Area of cross-section.

Calculating SI unit of Intensity.

SI unit of P is watt

Unit of A is m²

$$\begin{gathered} \begin{array}{l}I=\frac{P}{A}\end{array} \\ I=\frac{Watt}{m^2} \\ I=watt{m}^{-2} \end{gathered}$$

Final Answer: The unit for measuring intensity of energy is watt per m².