If you halve the distance from a light source, the light intensity increases by a factor of four.

Here's why:

* Inverse Square Law: The intensity of light follows the inverse square law. This means the intensity is inversely proportional to the square of the distance from the source.

* Formula: Intensity (I) = (Power (P) ) / (4 * pi * Distance (d)^2)

* Example: If you double the distance, the intensity is reduced to 1/4th of its original value. Conversely, if you halve the distance, the intensity increases to four times its original value.

In simple terms: The closer you are to a light source, the more concentrated the light becomes, resulting in a brighter experience.