The Inverse Square Law (2000)

from Hacker News https://ift.tt/2wpDbds

Inverse Square Law, Radiation As one of the fields which obey the general inverse square law, a point radiation source can be characterized by the relationship below whether you are talking about Roentgens , rads, or rems . All measures of exposure will drop off by inverse square law. The source is described by a general "source strength" S because there are many ways to characterize a radiation source - by grams of a radioactive isotope, source strength in Curies, etc. For any such description of the source, if you have determined the amount of radiation per unit area reaching 1 meter, then it will be one fourth as much at 2 meters.

Index Gravity concepts