* The Inverse Square Law: Light spreads out in all directions from a source. Imagine a light bulb emitting light. This light travels outwards in a sphere. The surface area of that sphere increases as the radius (distance from the bulb) increases. The same amount of light is spread over a larger area, so the intensity (amount of light per unit area) decreases.
* Mathematical Representation: This relationship is described by the Inverse Square Law:
* I ∝ 1/d²
* Where:
* I is the intensity of light.
* d is the distance from the light source.
In simpler terms: If you double the distance from a light source, the intensity of the light will decrease by a factor of four (2² = 4). If you triple the distance, the intensity will decrease by a factor of nine (3² = 9).
Example:
* Imagine you're standing 1 meter away from a light source.
* Now you move to 2 meters away. The light has to cover twice the distance to reach you, and it spreads over four times the area. Therefore, the intensity of the light you perceive is one-fourth of what it was at 1 meter.
