The frequency of the radio wave is:
[tex]f=102.1 MHz = 102.1 \cdot 10^6 Hz[/tex]
The wavelength of an electromagnetic wave is related to its frequency by the relationship
[tex]\lambda= \frac{c}{f} [/tex]
where c is the speed of light and f the frequency. Plugging numbers into the equation, we find
[tex]\lambda= \frac{3 \cdot 10^8 m/s}{102.1 \cdot 10^6 Hz}= 2.94 m[/tex]
and this is the wavelength of the radio waves in the problem.
