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JAMB Physics 1984 Question 14

Question 14

Sound

When vibration occurs in an air column, the distance between a node and an antinode is equal to

  1. A.one-quarter of the wave length
  2. B.one-half of the wave length
  3. C.the wave length
  4. D.twice the wave length
  5. E.four-times the wave length.
Show the answer and explanation

Answer: A (one-quarter of the wave length)

Explanation

Nodes are half a wavelength apart and an antinode sits midway between them, so node to antinode is λ/4.