Question

A source of wave produces 40 crests and 40 troughs in 0.4s.What is the frequency of the wave.

Answer 1

Answer:

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Answer 2

$\huge\bold\red{ANSWER:-}$

One crest and and one trough constitutes one cycle.

40 crests and 40 troughs involves 40 cycles.

Time taken for one cycle is called time period.

So, Time period = 0.4 s / (40) = 0.01 s

Frequency = 1 / Time period = 1 / (0.01 s) = 100 Hz

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