Exam-style question
Try this first
Which factor does NOT affect the energy of X-ray photons?.
- A.Voltage applied to the X-ray tube.
- B.Material being imaged.
- C.Time of exposure.
- D.Distance from the X-ray source.
Model answer
What a good answer should say
- Distance from the X-ray source.
Explanation
Why this works
The energy of X-ray photons is primarily determined by the voltage applied to the X-ray tube and the material being imaged, while the distance from the source affects intensity, not photon energy.
Common mistake
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