# i don't really understand what this means - Nuclear decay A2 PhysicsWatch

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#1
'like all electromagnetic radiation, gamma rays obey an inverse-square law, meaning that their intensity falls off as the square of the distance in air'
I don't understand the bit in bold
thankyou
0
5 years ago
#2
Intensity is proportional to 1/(distance squared)
0
5 years ago
#3
(Original post by pureandmodest)
'like all electromagnetic radiation, gamma rays obey an inverse-square law, meaning that their intensity falls off as the square of the distance in air'
I don't understand the bit in bold
thankyou
I think that it's just poorly worded which is probably why you don't understand. I think it's just trying to say that as the rays are spread out over a greater area their intensity decreases, it's the square of the distance from the source because area is in m^2.
1
#4
(Original post by ninuzu)
Intensity is proportional to 1/(distance squared)
(Original post by yepyepyep)
I think that it's just poorly worded which is probably why you don't understand. I think it's just trying to say that as the rays are spread out over a greater area their intensity decreases, it's the square of the distance from the source because area is in m^2.

thankyou very much : )
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