A source produces 20 crests and 20 trough in 0.4 seconds, find its frequency
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20 crests and 20 trough makes 20 waves.
20 waves produced in 0.4 sec
Then 1 wave = 0.4/20
Time period of wave is 0.02
frequency= 1/0.02
= 50 Hz
20 waves produced in 0.4 sec
Then 1 wave = 0.4/20
Time period of wave is 0.02
frequency= 1/0.02
= 50 Hz
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