Question

What is the frequency of an electromagnetic wave if it has a wavelength of 1.1 km? The speed of light is 3 × 108 m/s. Answer in units of Hz.

Answer 1

Answer:
`f=272727.272Hz`

Step-by-step explanation:

The speed of light (electromagnetic wave) is given by the following formula:

`c=f.\lambda` (1)

Where:

`c=3(10)^(8)(m)/(s)` is the speed of light

`f` the frequency

`\lambda=1.1km=1100m` the wavelength

So, we have to find
`f` from (1):

`f=(c)/(\lambda)` (2)

`f=(3(10)^(8)(m)/(s))/(1100m)`

Finally:

`f=272727.272(1)/(s)`

Knowing
`1Hz=(1)/(s)`

`f=272727.272Hz`