Question

A source of wave produces 40 crests and 40 troughs in 0.45sec. What is the frequency of the wave?

Answer 1

Answer:

Yes! Here is your answer!

Explanation:

The frequency of the wave is 50 Hz

Frequency is the number of oscillations per second.

It is given by

                        f = 1/t

Unit of frequency is 1/s or hertz.

Now, a wave comprises of a crest and a trough.

In this problem, we need to find the number of waves produced in 1 s in order to find out the frequency.

From the given question,

20 waves -------- 0.4s

n waves  --------    1s

20 x 1 = n x 0.4

n = 20/0.4

= 5/0.1

= 50 Hz

Answer 2

Answer:

frequency =1/time period

ie, frequency =1/0.45=2.22 answer

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