Inverse Square Law of Light Explanation from Karl Taylor

Karl Taylor is back with another solid video. This time he’s breaking down the sometimes difficult-to-comprehend concept of the inverse square law into more understandable terms.

The inverse square law in photographic lighting says, the intensity of light radiating from a source is inversely proportional to the square of the distance from the source. As a result, an object 2 meters away from a light source, receives only one-quarter the light as an object that is 1 meter away from the source.

Check out Karl’s video embedded above for a practical demonstration of this principle. And notice how Karl demonstrates it by shortening the ratio of distance between the two subjects and the light source.



  1. says

    I’m waiting for an explanation from a photographer who realizes that the Inverse Square Law isn’t just about light, but electromagnetic radiation.