Question: If a sample emits 2000 counts per second when the detector is 1 meter from the sample, how many counts per second would be observed

If a sample emits 2000 counts per second when the detector is 1 meter from the sample, how many counts per second would be observed when the detector is 3 meters from the sample? And how many counts per second would be observed when the detector is 10 meters away from the sample?

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