The lower frequency is
[tex]f_1 = 87.9 MHz=87.9 \cdot 10^6 Hz[/tex]
the higher frequency is
[tex]f_2 = 107.9 MHz = 107.9 \cdot 10^6 Hz[/tex]
The relationship between the frequency of an electromagnetic wave and its wavelength is given by
[tex]\lambda = \frac{c}{f} [/tex]
where [tex]c=3 \cdot 10^8 m/s[/tex] is the speed of light. Using this formula, we can calculate the wavelengths corresponding to the upper and lower frequencies:
[tex]\lambda _1 = \frac{c}{f_1}=3.41 m [/tex]
[tex]\lambda _2 = \frac{c}{f_2}=2.78 m [/tex]
So, the electromagnetic waves that carry fm radio are in the range of wavelength [2.78-3.41] m.
