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Q: Which type of waves is used to penetrate hard object at hospital and airport?
  • A. Sound wave
  • B. X-rays
  • C. Electromagnetic
  • D. The mechanics
Correct Answer: Option B - Note : Question has discrepancy. • X-ray is used to penetrate hard object at hospital and Airport. • X-rays are used in hospitals whereas electromagnetic waves are also used for MRI and CT scanning. • X-rays are discontinued at airport which has been replaced by millimeter scanner and full body scanner.
B. Note : Question has discrepancy. • X-ray is used to penetrate hard object at hospital and Airport. • X-rays are used in hospitals whereas electromagnetic waves are also used for MRI and CT scanning. • X-rays are discontinued at airport which has been replaced by millimeter scanner and full body scanner.

Explanations:

Note : Question has discrepancy. • X-ray is used to penetrate hard object at hospital and Airport. • X-rays are used in hospitals whereas electromagnetic waves are also used for MRI and CT scanning. • X-rays are discontinued at airport which has been replaced by millimeter scanner and full body scanner.