Which one of the following statements about X-rays is <strong>NOT</strong> true?
- A. They have wavelengths of about 1 \text{ \AA}.
- B. These can be generated by bombarding a metal target by high energy electrons.
- C. Due to their wavelengths being shorter, these can be used for radar systems. ✓
- D. These are also used for the treatment of certain forms of cancer.
Correct Answer: C. Due to their wavelengths being shorter, these can be used for radar systems.
Explanation
Radar systems use microwaves and radio waves, not X-rays, for detection.
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