What is the radiation dose when the operator doubles the distance from the primary beam?

What is the radiation dose when the operator

Multiple choice — select the best answer

A1/10
B1/2
C1/3
D1/4

✓ Correct answer: D. 1/4 The intensity of the primary x-ray beam is directly proportional to the distance between the source and the image. At twice the distance, the beam intensity is reduced to 1/4 of its original intensity.

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What is the radiation dose when the operator doubles the distance from the primary beam?

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