Radiation from a point source follows an inverse-square law in which the amount of radiation received is proportional to 1/d2, where d is distance. If a Geiger counter that is 1 m away from a small source reads 140 counts per minute, what will its reading be 2 m from the source? 3m from it?

Introductory Chemistry For Today
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Chapter10: Radioactivity And Nuclear Processes
Section: Chapter Questions
Problem 10.25E
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Radiation from a point source follows an inverse-square law in which the amount of radiation received is proportional to 1/d2, where d is distance.

If a Geiger counter that is 1 m away from a small source reads 140 counts per minute, what will its reading be 2 m from the source?

3m from it?

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