Any law describing a force or other phenomenon that decreases in strength as the square of the distance from some central reference point. The term inverse-square law is often used by itself to mean the law staling that the intensity of light emitted by a source such as a star diminishes as the square of the distance from the source.
Illuminance at a point varies directly with the intensity, I, of a point source and inversely as the square of the distance, d, to the source. E = I/D, where D = d*d.
The law that a field follows if its strength decreases with the square of the distance. Fields that follow the inverse square law rapidly decrease in strength as the distance increases, but never quite reach zero.
The law stating that the illuminance at a point on a surface varies directly with the intensity of a point source, and inversely as the square of the distance between that source and that surface.
In a free sound field (no reflections) the sound level of a non-directional source will diminish by 6 dB for every doubling of distance from the source. In rooms this can only apply to the direct sound from some kinds of sources. See also: Far Field
The mathematical description of how the strength of some forces, including gravity, changes in inverse proportion to the square of the distance from the source.
The amount of energy (light) flowing through a given area in a given time (flux) decreases in proportion to the square of the distance from the source of energy or light.
A principle dictating the decrease in the strength of some quantity rapidly with the square of the distance.
A relation between physical quantities of the form: is proportional to 1/ 2, where is most often a distance, and is often a force or flux. An example of the inverse square law is the decrease of radiative flux with distance from a point source, as is often used to approximate radiation reaching the earth from the sun.
In physics, an inverse-square law is any physical law stating that some physical quantity or strength is inversely proportional to the square of the distance from the source of that physical quantity.