How to Calculate the Wavelength of a 106.5 MHz FM Radio Signal?

[lilkrazyrae]

A FM radio station has a frequency of 106.5MHz. Find its signal wavelength.

I am guessing that you would use the speed of sound in this problem correct me if I am wrong.

So Wavelength=v/f
=343/1.065*10^8
=3.22*10^-6m

Is this right?

 

[Pengwuino]

No, you use the speed of a photon which is ~3.0 x 10^8. A radio station broadcasts a radio signal, not a sound signal or else you could hear it by stepping out of your car :)

 

[siddharth]

No, not the speed of sound.
Radio is the wireless transmission of signals, by modulation of electromagnetic waves.

 

[lilkrazyrae]

Well that makes sense; although, it would be nice to hear the radio when you stepped out of your car. So wavelength=v/f=3.0e8/1.065e8=2.82m right??

 

[Pengwuino]

Yup that is right.

 

[lilkrazyrae]

Thanks so much!