If the intensity of the x-ray beam is inversely proportional to the square of the distance from the source,how does the intensity of the x-ray beam change when the distance from the source of radiation and a measurement point is tripled?
A) It increases by a factor of 3 at the new distance.
B) It increases by a factor of 9 at the new distance.
C) It decreases by a factor of 9 at the new distance.
D) It decreases by a factor of 3 at the new distance.
Correct Answer:
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