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inverse-square law

The principle in physics that the effect of certain forces on an object varies by the inverse square of the distance between the object and the source of the force. The magnitude of light, sound, and gravity obey this law, as do other quantities. For example, an object placed three feet away from a light source will receive only one ninth (132, the inverse of 3 squared) as much illumination as an object placed one foot from the light.

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Nearby words

  1. inverse cosine,
  2. inverse cotangent,
  3. inverse function,
  4. inverse image,
  5. inverse square law,
  6. inversely,
  7. inversion,
  8. inversion casting,
  9. inversion layer,
  10. inversion of uterus
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.