inverse square law


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law

 [law]
a uniform or constant fact or principle. For specific named laws, see under the name.
law of independent assortment the members of gene pairs segregate independently during meiosis; see also mendel's laws.
inverse square law the intensity of radiation is inversely proportional to the square of the distance from the source of radiation.
law of segregation in each generation the ratio of (a) pure dominants, (b) dominants giving descendants in the proportion of three dominants to one recessive, and (c) pure recessives is 1:2:1. This ratio follows from the fact that the two alleles of a gene cannot be a part of a single gamete, but must segregate to different gametes. See also mendel's laws.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

in·verse square law

as applied to point sources, the intensity of radiation diminishes in proportion to the square of the distance from the source.
Farlex Partner Medical Dictionary © Farlex 2012

in·verse square law

(in'vĕrs skwār law)
In radiation therapy, proposition that intensity of a radiation beam is inversely proportional to the square of the distance from the source of radiation.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Figure 6 shows determinations of air kerma rate at four distances, along with a fit to the inverse square law. The fit equation shown in Fig.
The alternative of stand-off lamming using a large airframe or highflying UAV runs into two key obstacles: the inverse square law pushes up the size, weight and cost of the jamming package, while the limited survivability of the platforms constrains their effective footprint to less than the radio/radar horizon.
This problem, known as 'the inverse problem', was the problem which Halley had asked him to solve, assuming that the law of force is an inverse square law. It was tackled again in the Principia, but no complete solution to it was ever provided by Newton.
Because of the continual duplication of the SMBs, clairvoyance would not be subject to the inverse square law, as the density of SMB copies would not decrease with distance.
Lotka (1926) proposed an inverse square law relating authors of scientific articles to the number of articles written by each author.
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. They theorized that a previously unrecognized force -- acting over distances of tens to thousands of meters -- had altered the attraction between the gravity meter and the rock around the shaft.
because it then gives [nabla].g = -4[pi]G[rho](r, t), [nabla] x g = 0, which is Newton's inverse square law of gravity in differential form.
Sunlight intensity falls off according to the inverse square law which means that solar panels would produce just one per cent of their power output here on Earth.
He begins with the physical characteristics of sound--vibration, velocity, wavelength and frequency, harmonics, sound envelopes --and then moves on to perceptual issues, introducing concepts such as perceptual masking, sound localization, the Haas effect and the Inverse Square Law, the decibel, and equal-loudness contours.
DEW weapons also have maximum ranges, but there is normally not a discrete cut-off point beyond which the weapon's effects diminish according to the inverse square law. For close-in defense, DEW weapon effects intensify with decreasing range.
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.
Newton's inverse square law of gravity, when expressed in terms of an acceleration field g(r, t), has the differential form: