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inverse square law

   Also found in: Wikipedia, Hutchinson 0.03 sec.
inverse square law,
a law stating that the amount of radiation reaching a surface is inversely proportional to the square of the distance between the source and the surface. For example, a person standing 1 m from a patient being treated with radium is exposed to four times more radiation than a person standing 2 m from the patient.

inverse square law
for a given exposure the amount of radiation falling on a given area of radiographic film varies inversely as the square of the distance of that area from the source of irradiation in the focal spot.


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In effect, the rate at which oil mass is lost from an ink decays according to an approximate inverse square law with time.
Scientists raised the idea of a fifth force in 1986 after finding hints that the gravity inside an Australian mine shaft did not follow Newton's inverse square law.
At stake is the accuracy of Newton's inverse square law of gravity, which holds that the gravitational attraction between two bodies is proportional to one over the square of the distance separating the bodies.
 
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