Intensity Calculator

Calculate Intensity



Formula

The formula to calculate the intensity is:

\[ I = \frac{P}{4 \pi r^2} \]

Where:

What is Intensity?

Intensity is defined as the power per unit area contained by a wave. It measures the amount of energy that a wave carries through a unit area per unit time. This concept is commonly used in various fields, including physics, acoustics, and electromagnetism, to describe the strength of waves such as light, sound, and electromagnetic radiation.

Example Calculation

Let's assume the following values:

Using the formula to calculate the intensity:

\[ I = \frac{100}{4 \pi (2)^2} \]

Calculating the denominator:

\[ 4 \pi (2)^2 = 4 \pi \cdot 4 = 16 \pi \]

Therefore:

\[ I = \frac{100}{16 \pi} \approx \frac{100}{50.2655} \approx 1.99 \text{ W/m²} \]

The Intensity is approximately 1.99 W/m².