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JAMB Physics 1995 Question 29

Question 29

Waves

The difference between sound waves and light waves is that sound waves

  1. A.are transverse while light waves are longitudinal
  2. B.require a medium to travel while light waves do not
  3. C.can be diffracted but light waves cannot
  4. D.cannot be reflected but light waves can
Show the answer and explanation

Answer: B (require a medium to travel while light waves do not)

Explanation

Sound is a mechanical wave and needs a medium; light is electromagnetic and can travel through a vacuum.