The intensity of an electromagnetic wave depends on the square of its amplitude.
Simple Explanation:
- The amplitude of an electromagnetic wave is related to the strength (or maximum value) of its electric and magnetic fields.
- If the amplitude doubles, the intensity becomes four times as much.
- This is because intensity measures the energy carried per second per unit area, and energy depends on the square of the field strength.
In short:
- Intensity ∝ (Amplitude)²
So, bigger amplitude means more energy and brighter or stronger electromagnetic waves!