Question

What is the wavelength, in metres, of an EM wave emitted by an AM radio station at 70 kHz?

Answer 1

Wavelength of an EM wave is 4285.71 meters.

Step-by-step explanation:

It is given that,

Frequency of the AM radio station,
`f=70\ kHz=7* 10^4\ Hz`

We need to find the wavelength of an EM wave. The relation between frequency and the wavelength is given by :

`\lambda=(c)/(f)`

c is the speed of light

`\lambda=(3* 10^8\ m/s)/(7* 10^4\ Hz)`

`\lambda=4285.71\ m`

So, the wavelength of an EM wave is 4285.71 meters. Hence, this is the required solution.