Question

What would be the frequency of an electromagnetic wave having a wavelength equal to Earth’s diameter (12,800 km)? In what part of the electromagnetic spectrum would such a wave lie?

Answer 1

f = 23.43 Hz for radio waves.

Step-by-step explanation:

In this case, we need to find the frequency of an electromagnetic wave having a wavelength equal to Earth’s diameter i.e. 12,800 km. The relation between the frequency, wavelength and the speed is given by :

`v=f\lambda`

Electromagnetic wave moves with a speed of light

`c=f\lambda`

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

`f=(3* 10^8)/(12800* 10^3)`

f = 23.43 Hz

So, the frequency of an electromagnetic wave is 23.43 Hz. It belongs to radio waves.