Question

A wave emitted from a source has a frequency of 10 Hz and wavelength 2.5 m. How much time will it take to reach a person located 5 m from the source?

Answer 1

time taken by the wave to reach the person is 0.2 s

Step-by-step explanation:

As we know that the speed of the wave is given as

`v = \lambda f`

here we know that the wavelength of the wave is

`\lambda = 2.5 m`

`f = 10 Hz`

now speed of the wave is given as

`v = 10(2.5)`

`v = 25 m/s`

Now time taken by the wave to reach 5 m distance is

`t = (L)/(v)`

`t = (5)/(25)`

`t = 0.2 s`