Question

A. Wave source. Produces. 20. Creast and. 20 troughs. In. 0.2. Find. The. Frequency. Of. The. Wave

Answer 1

20 Crest and 20 trough means 20 cycle of wave.

In 0.2 seconds 20 cycle.

So 1 second x cycles.

x = 20/0.2 cycles
x = 100 cycles

Frequency = Number of cycles per second

Frequency = 100 Hz