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13 April, 10:42

A source of wave produces 20 crest sand 20 troughs in 0.4 sec. Find the frequency of the wave.

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Answers (2)
  1. 13 April, 12:21
    0
    1 whole wave is 1 crest and 1 trough.

    20 crests and 20 troughs is 10 whole waves.

    10 waves / 0.4 seconds = 25 waves per second.
  2. 13 April, 12:40
    0
    1 crest + 1 trough = 1 wave.

    20 crest + 20 troughs = 20 waves.

    20 waves/0.4 sec = frequency.

    frequency = 0.5
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