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Physics Hard CSS FPSC Uploaded: 13 Jul 2026

Which effect describes the change in wavelength of X-rays scattered by electrons?

  • A Photoelectric effect
  • B Compton effect
  • C Zeeman effect
  • D Hall effect
Correct Answer: Option B — Compton effect
Explanation:
The Compton effect describes the increase in wavelength of X-rays or gamma rays when they scatter off electrons demonstrating the particle nature of electromagnetic radiation.
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Submitted by: PaperMCQs
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