P3.6 - Nuclear Radiation and Intensity

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  • Created by: Chris
  • Created on: 26-05-10 15:27

Radiation is used to describe any form of any originating from a source.

Intensity = power of incident radiation/area I = P divided by A

With power (in Watts) and Area (in metres squared), Intensity is measured in Watts per metre squared.

The intensity of radiation will decrease with distance from a source and/or with the nature of the medium through which it is being transmitted:

Light hitting an area will have intensity (in Watts per metre squared).

Light travelling twice as far will spread covering twice the width and twice the height.

This is 4 times the original area and so the intensity is ¼ the


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