According to the inverse square law, if the distance from a point X-ray source is doubled, the intensity of the beam becomes:
- A One-fourth the original intensity ✓
- B One-half the original intensity
- C One-eighth the original intensity
- D Unchanged
Correct answer: A. One-fourth the original intensity
Explanation
The inverse square law states that intensity is inversely proportional to the square of the distance from the source. Doubling the distance reduces intensity to 1/4 (1/2²). This principle is fundamental in radiation protection and radiographic technique.
Reference: Radiologic Science for Technologists, 12th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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