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JAMB Physics 1979 Question 6

Question 6

Sound

Which one of the following types of waves cannot travel through a vacuum?

  1. A.sound waves
  2. B.light waves
  3. C.infra-red waves
  4. D.x-radiation
  5. E.radio waves.
Show the answer and explanation

Answer: A (sound waves)

Explanation

Sound is a mechanical wave and needs a material medium. Light, infra-red, X-rays and radio waves are electromagnetic and can cross a vacuum.