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The diagram above represents part of a wave motion in air. If the wave travels...

Physics
WAEC 1990
The diagram above represents part of a wave motion in air. If the wave travels with a speed of 300ms-1calculate the frequency of the wave.
  • A. 360Hz
  • B. 300Hz
  • C. 250Hz
  • D. 150Hz
  • E. 100Hz
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Correct Answer: Option C
Explanation
21/2λ = 3m; λ = 1.2m v= 300
f = v/x = 300/1.2 = 250Hz
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