If a message signal of frequency 'fm' is amplitude modulated with a carrier signal of frequency 'fc' and radiated through an antenna, the wavelength of the corresponding signal in air is:
1
\(\frac{c}{{{f_c} - {f_m}}}\)
2
\(\frac{c}{{{f_c} + {f_m}}}\)
3
\(\frac{c}{{{f_c}}}\)
4
\(\frac{c}{{{f_m}}}\)