Question

Question #43768

Answer 1

Let's see.

Explanation:

Given that,

In `0.4` seconds, a wave completes `40` vibrations.

Hence, in `1` second, the wave would complete `rarr`

`=40/0.4` vibrations

`=100` vibrations.

Therefore, the frequency of the wave is `100Hz`. (Answer).

Hope it Helps:)